pmi rational expressions & equations...
TRANSCRIPT
Alg II - Rationals ~1~ NJCTL.org
PMI Rational Expressions & Equations Unit
Variation
Class Work
1. y varies inversely with x. If π¦ = 12 when π₯ = 4, find y when π₯ = β6.
2. y varies inversely with x. If π¦ = 8 when π₯ = 3, find x whenπ¦ = β2.
3. y varies inversely with x2. If π¦ = 3 whenπ₯ = 5, find y whenπ₯ = 3.
4. Circumference varies directly with area of a circle and inversely with the radius. Find the constant of variation if πΆ = 18
when π΄ = 27 and π = 3. What is radius when πΆ = 25 and π΄ = 50?
5. y varies jointly with x and z. If π¦ = 24 when π₯ = 4 and π§ = 2, find y when π₯ = β6 and π§ = 2.
6. y varies jointly with x and z. If π¦ = 32 when π₯ = 4 and π§ = 2, find x when π¦ = 48 and π§ = 2.
7. V varies jointly with r2 and h. If π = 24π when β = 6 and π = 2, find r when π = 18π and β = 2.
Variation
Homework
8. y varies inversely with x. If π¦ = 9 whenπ₯ = 4, find y whenπ₯ = β6.
9. y varies inversely with x. If π¦ = 8 when π₯ = 5, find x when π¦ = β2.
10. y varies inversely with x2. If π¦ = 3, when π₯ = 4, find y when π₯ = 3.
11. Area of a triangle varies jointly with its height and base. Find the constant of variation if π΄ = 16 when β = 4 and π = 8.
What is base when π΄ = 9 and β = 3?
12. y varies jointly with x and z. If π¦ = 24 when π₯ = 6 and π§ = 2, find y when π₯ = β6 and π§ = 3.
13. y varies jointly with x and z. If π¦ = 40 when π₯ = β4 and π§ = 2, find x whenπ¦ = 60 and π§ = 2.
14. V varies jointly with r2 and h. π = 36π when β = 4 and π = 3, find r whenπ = 80π and β = 5.
Alg II - Rationals ~2~ NJCTL.org
Reducing Rational Expressions
Class Work
Simplify.
15. 3x
6 16.
40b
12b 17.
12x2
4x 18.
18a3b2
14a5b6
19. 60j4k6m8
16j3k6m9 20. 12c2β 6
3 21.
8n2+ 4n
6n2 + 3n 22.
5h β 10
4h β 8
23. . v2 β 4v + 4
v2 β 4 24.
f2 + 7f + 12
f2 β 2f β 15 25.
4s3 β 20s2 + 24s
16 β 8s 26.
2d2 β 7d + 6
3d2 β 8d + 4
27. 4π₯3 β 4π₯2 β 15π₯
2π₯5 β 3π₯4 β 5π₯3 28. 54π₯4 β 6π₯2
54π₯3 β 72π₯2 + 18π₯ 29.
4π3 β 4
2π2 + 2π + 2 30.
3π2 + 7π β 6
π2 + π β 6
31. 8π2 + 4π β 60
4π β 10 32.
2π₯3 + 2π¦3
4π₯2 β 4π¦2 33. 12π2π2 β 12
4πππ β 4π 34.
15π₯3 + 7π₯2 β 2π₯
3π₯4 + 2π₯3
35. 3π2 β π β 2
4 β 4π
36. 6π₯3 + 15π₯2+ 9π₯
12π₯ + 6π₯2 β 6π₯3
Alg II - Rationals ~3~ NJCTL.org
Reducing Rational Expressions
Homework
Simplify.
37. 9y
6 38.
48c
16c 39.
12x2
8x3 40.
28a3b2
14a4b8
41. 60j4k6m8
12j2k6m10 42.
12c2β 9
6 43.
10n2β 5n
15n2 β 35n 44.
12h β 8
9h β 6
45. v2 β 4v + 3
v2 β 9 46.
f2+ 12f + 27
f2 + f β 72 47.
5rs3 β 20rs2 + 15rs
15r β 5rs 48.
4d2 + 5d + 1
3d2 + 5d + 2
49. π₯4β π₯2
π₯4 β π₯3 50. 2π3 β 2π3
12ππ β 12ππ 51.
4π2 β 4ππ + 4π2
π3 + π3 52. 8ππ2β 2π
4π2 β 1
53. 12π₯3 β 10π₯2 + 2π₯
2π₯5 + π₯4 β π₯3 54.
6π2π2 β 5ππ3 + π4
4π2 β π2 55.
π₯2π¦ β 4π₯π¦
π₯4π¦3 β 2π₯3π¦3 56.
12π3β 4π π3
4ππ 2 β 6ππ β 18π
57. 6π2β 15π + 6
18 β 30π β 12π2 58. βπ₯ + 2
4π₯2 β 7π₯ β 2
Alg II - Rationals ~4~ NJCTL.org
Multiplying & Dividing Rational Expressions
Class Work
Perform the indicated operation. Write answer in simplified form.
59. 8π β11
12π 60.
12π
5πβ
15π2
8π3 61.
π + π
π + 2β
π2 β 4
(π + π)2
62. π2β 7π + 12
π2β 9β
π2+ 4π + 4
2π2 + 6π + 4 63.
g + 5
h + 3β
h2 β h β 12
g2 β 25β
g2 β 3g β 10
h2β 5h + 4 64.
14h
15Γ· 6h
65. 5π2 Γ·10π
9 66.
π + π
π2+ 2ππ + π2 Γ·2π + 3π
π2 β π2 67. π + 5
π2 + 7π + 10Γ·
π2 + 5π + 6
π2 β 4
68.
2
n2 β 44
n β 2
69. p2 + 4p + 3
p2 + 7p + 10Γ·
p2β 1
p2+ 2p + 1β
p β 1
p2 + 5p + 6
70. 4q2r
12q5r3 Γ·16q5r4
18q3r8 Γ·8q6r3
24qrβ
q2r5
q5r2 β 2
71. π₯3 β 27
π₯2 β 9Γ·
4π₯ β 2
2π₯2 + 5π₯ β 3 72.
3 β π
2π + 1β
6π2+ π β 1
π2β 9 73.
π2 β π2
3π2 β 5ππ + 2π2 β3ππ2 β 2π3
π
74. 4π2β 4ππ + 4π2
π3+ π3 βπ2β π2
12π β 12π 75.
6π2+ 9π + 3
6π2+ 24π + 18 Γ·
2π2+ 7π + 3
2π2+ 3π β 9 76.
8 + 2π₯ β π₯2
π₯2 β π₯ β 12β
π₯ β 2
3π₯2 + 5π₯ β 2
77. A rectangular shaped βdartboardβ has dimensions (3x +3) by (2x+1) inches. On the board is a square with sides (x+1)
inches. What is the probability that a randomly thrown dart that hits board lands in the square?
Alg II - Rationals ~5~ NJCTL.org
Multiplying & Dividing Rational Expressions
Homework
Perform the indicated operation. Write answer in simplified form.
78. 9π β11
12π 79.
18π
5πβ
20π5
8π4 80.
π + π
π β 2β
π2 β 4
(π + π)3
81. π2β 8π + 15
π2β 25β
π2+ 10π + 25
2π2β 4π β 6 82.
g + 4
h + 7β
h2+ 3h β 28
g2β 16β
g2+ 10g + 21
h2β 7h + 12 83.
10h
15Γ· 8h
84. 6π2 Γ·12π
9 85.
2π + 3π
π2β 2ππ + π2 Γ·2π + 3π
π2 β π2 86. π + 6
π2+ 7π +12Γ·
π2+ 5π β 6
π2β 9
87.
n2β 1
n2β 4n + 4n β 1
n2β 4
88.
p2+ 4p + 4
p2+ 7p + 12Γ·
p2β 4
p2+ 5p + 4β
pβ 2
p2+ 4p + 3 89.
10q9r
15q2r7 Γ·20q7r12
16q2r10 Γ·8q7r5
25q3rβ
q3r4
q8r3 β π
90. 27π₯3β π¦3
18π₯2+ 6π₯π¦ + 2π¦2 β4π₯2β π¦2
6π₯2β 5π₯π¦ + π¦2 91. ππ3+ π4
3ππ4β π5 Γ·3π2β ππ β 4π2
6π2β 11ππ + 4π2 92. 8ππ β 2ππ
π2β π2 Γ·20ππ2β 5ππ2
25π β 25π
93. 6π₯2β 17π₯ + 5
4π₯2β 9π₯ + 2Γ·
6π₯2+ 7π₯ β 3
3π₯2β π₯ β 10 94.
3 β π₯
π₯2+ π₯ β 20β
2π₯2β 7π₯ β 4
2π₯2β 5π₯ β 3 95.
8 β 2π β 3π2
5π2β 3π3 Γ·4 β 3π
3π5 + π4β 10π3
96. A rectangular shaped βdartboardβ has dimensions (4x+6) by (2x+3) inches. On the board is a square with sides
(2x+3) inches. What is the probability that a randomly thrown dart that hits board lands in the square?
Alg II - Rationals ~6~ NJCTL.org
Adding and Subtracting Rational Expressions
Class Work
Perform the indicated operation. Write answer in simplified form.
97. 5
2x+
3
2x 98.
6y
4β
2y
4 99.
z β 3
6+
2z
6
100. 4w + 7
2w + 1β
2w + 6
2w + 1 101.
5v + 1
2v + 3+
v + 8
2v + 3 102.
3(u + 2)
2u β 1β
5(u + 1)
2u β 1
103. 3
x + 4+
2
x β 4 104.
5
x2β 9β
2x
x β 3 105.
5
x2 + 4x + 4+
6
x2β 4
106. 2
x β 3+
3
x2β 7x + 12+
4
x β 4 107.
π₯2 β 2
3π₯2 β π₯β
π₯2 β 3
3π₯ β 1
108. 3π₯ β π₯ β 4
π₯2 + 4π¦
109. 5
x2β 5x + 6+
4
x2+ 3x β 10β
3
π₯2+ 2π₯ β 15 110.
2π + 4
π β 6+
3π β 10
6 β π 111.
2π₯2 β π₯
4 β π₯β
2π₯2
π₯ β 4β
π₯2
π₯
112. 4π₯ β 2
2π₯2 β 5π₯ + 3β
3π₯ β 5
2π₯2 + π₯ β 6+
π₯2
π₯2 + π₯ β 2 113.
4π¦ β 9
3π¦ + 2β 5π¦
Alg II - Rationals ~7~ NJCTL.org
Adding and Subtracting Rational Expressions
Homework
Perform the indicated operation. Write answer in simplified form.
114. 4
3x+
8
3x 115.
7y
5β
2y
5 116.
5z β 4
6+
5z
6
117. 5w + 4
3w + 2β
2w + 2
3w + 2 118.
3v + 7
4v + 6+
v + 9
4v + 6 119.
4(2u + 1)
2u β 1β
2(u + 8)
2u β 1
120. 3
3t β 1+
2
2t + 2 121.
5
x2β 5x + 6β
2x
x β 3 122.
5
x2+ 6x + 9+
6
x2β 9
123. 2
x + 3+
3
x2β 3x β 18+
4
x β 6 124.
5
x2β 4x + 3+
4
x2+ x β 12β
3
π₯2+ 3π₯ β 4 125. 4 β
2π₯ β 3
3π₯ β 2
126. 4π₯
π₯ β 3+
6π₯ β 5
2π₯2 β 6π₯ 127.
6π β 2
4 β πβ
π β 1
π β 4 128.
8π + 4
3 β 2πβ
6π + 2
2π β 3
129. 3π β 2
16π2 β 1β
6π + 5
8π2 β 6π + 1 130.
2π¦ β 7
6π¦2 + π¦ β1β
π¦2 β π¦
2π¦2 β π¦ β 1
Alg II - Rationals ~8~ NJCTL.org
Solving Rational Equations
Class Work
Solve for x. Check for extraneous solutions.
131. 2
x + 3=
3
x β 2 132.
4
2x β 1=
6
x + 5
133. 2x β 1
2+
x + 3
10=
6x
5 134.
5
2xβ
x + 3
x=
3
4
135. 2
x + 3+
5
2=
1
x + 3 136.
2
x β 3+
4x
x2β 9=
β1
x + 3
137. 3
x + 2β
4
x β 1=
5
x2+ x β 2 138.
x
x + 5β
2
x β 3=
1
x2+ 2x β 15
139. 2
x2β 4+
1
x β 2=
3
x + 2β
5
x2β 4x + 4 140.
30
5π₯+ 3 =
6
π₯
141. 5
2π₯+
7
3=
2
3π₯β
4
6 142.
4
3π₯ β 2+
2
π₯ β 1=
12
3π₯2 β 5π₯ + 2
143. 3
π₯3+ 27+
2
π₯ + 3=
5
π₯2 β 3π₯ + 9
Alg II - Rationals ~9~ NJCTL.org
Solving Rational Equations
Homework
Solve for x. Check for extraneous solutions.
144. 2
x β 1=
5
x + 4 145.
5
3x + 4=
6
3x + 6
146. 3x + 1
3+
4 β x
2=
5x
6 147.
5
3xβ
x + 3
x=
3
2
148. 2
x β 3+
5
3=
1
x β 3 149.
3
x β 2+
2x
x2β 4=
16
x + 2
150. 7
x + 5β
2
x β 2=
3
x2+ 3x β 10 151.
x
2x + 1β
2
x β 1=
x+2
2x2β x β 1
152. 2
x2+ 4x + 3+
1
x + 3=
3
x + 1β
5
x2+ 6x + 9 153.
2π₯
4+
5
π₯=
7
π₯
154. 3
2π₯ β 1+
4
2π₯ + 1=
3
4π₯2β 1 155.
β4
π₯ β 1+
2
π₯3 β 1=
8
π₯2 + π₯ + 1
156. 4
π₯+
3
4π₯=
β2
3+
5
π₯
Alg II - Rationals ~10~ NJCTL.org
Graphing Rational Expressions
Class Work
Graph the following functions. Clearly indicate any x-intercepts, y-intercepts, asymptotes and holes (discontinuities) on
the graph, noting them in the spaces provided below.
157. π(π₯) =2
π₯β1
x-intercepts: ____________________ y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
158. π(π₯) =β3
π₯+2
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
159. β(π₯) =π₯+1
π₯2β1
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
160. π(π₯) =π₯β1
(π₯β1)(π₯+2)
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
161. π(π₯) =π₯2+5π₯+6
π₯2+3π₯+2
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
162. β(π₯) =π₯2βπ₯β6
π₯2β5π₯+6
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
Alg II - Rationals ~11~ NJCTL.org
Graphing Rational Expressions
Homework
Graph the following functions. Clearly indicate any x-intercepts, y-intercepts, asymptotes and holes (discontinuities) on
the graph, noting them in the spaces provided below.
163. π(π₯) =2
π₯+3
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
164. π(π₯) =β3
π₯β4
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
165. π(π₯) =π₯+2
(π₯β1)(π₯+2)
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
166. β(π₯) =π₯β2
π₯2β4
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
167. π(π₯) =π₯2+9π₯+18
π₯2+7π₯+6
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
168. β(π₯) =π₯2+5π₯β14
π₯2+6π₯β7
x-intercepts: ____________________
y-intercepts: ____________________
Holes: _________________________
Vertical asymptotes: ______________
Horizontal asymptotes: ____________
Alg II - Rationals ~12~ NJCTL.org
Unit Review - Multiple Choice
1. Simplify 2π₯2β 10π₯ + 12
4π₯2β 12π₯
a. x β 2
2
b. x β 2
2x
c. (x β 3)(x β 2)
2x2β 6x
d. (x β 6)(x + 1)
2x(x β 3)
2. Simplify x2+ 15x + 56
x2β49β
x2β 10x + 21
x2 + 11x + 24
a. (x β 7)(x β 3)
(x + 7)(x + 3)
b. (x + 7)(x β 3)
(x β 7)(x + 3)
c. x β 3
x + 3
d. 1
3. Simplify 6π6π3
4π2π9 Γ·9π4π2
8π3π7
a. 4m3
3n
b. 4m5
3n11
c. 3n
4m3
d. 3n11
4m5
4. Simplify 2
3x2 β5
6x
a. β1
6x2
b. 4β5x
6x2
c. β1
6x
d. β1
3x2
5. Simplify 2
x2β 16+
4
x2+ 8x + 16
a. 6xβ24
(x β 4)(x + 4)(x + 4)
b. 6
(x + 4)(x + 4)
c. 6xβ8
(x β 4)(x + 4)(x + 4)
d. 6x
(x β 4)(x + 4)(x + 4)
Alg II - Rationals ~13~ NJCTL.org
6. The function β(π₯) =4π₯2β 3π₯ β 1
4π₯2 β 1 has which of the following discontinuities?
a. Vertical asymptotes at π₯ = Β±1
2
b. Removable discontinuity at π₯ = Β±1
2
c. Vertical asymptote at π₯ =1
2; removable discontinuity at π₯ = β
1
2
d. Vertical asymptote at π₯ = β1
2; removable discontinuity at π₯ =
1
2
7. h varies inversely with t. If β = 8 when π‘ = 6, find t when β = 16.
a. 2
b. 3
c. 8
3
d. 48
8. The volume of a cone varies jointly to its height and the square of the radius of its base. If V = 18π when β = 6
and π = 3. What is the radius when V = 12π and h = 4?
a. 1
b. 3
c. 6
d. 9
9. Simplify π₯+3
π₯+5β
4
π₯β5+
3π₯β7
π₯2β25
a. π₯2β3π₯+3
π₯2β25
b. π₯2β2π₯β15
π₯2β25
c. 4π₯β8
π₯2β25
d. π₯2β3π₯β42
π₯2β25
10. Solve: 3
x β 2=
4
x + 2
a. 4
b. 8
c. 14
d. no solution
11. Solve: 4x
x2β 1+
4
x β 1=
2
x + 1
a. -1
b. 1
c. 6
d. no solution
12. Solve: 2
x2β 9+
3
x2 β x β 6=
4
x2+ 5x + 6
a. -25
b. -8
c. 8
d. no solution
Alg II - Rationals ~14~ NJCTL.org
Extended Response
1. At math camp the lap pool is a rectangle that is (π₯2 β 16)ππ‘ by (π₯ + 3)ππ‘, the wading pool is a square with sides
(π₯ + 4)ππ‘.
a. How many times larger is the lap pool than the wading pool?
b. If the wading pool is (π₯ β 4)ππ‘ deep, what is the poolβs volume?
c. If the lap pool has a depth of (π₯ + 4)ππ‘, how many times larger is the volume of the lap pool to the
wading pool?
2. Determine each of the following for the graph of the rational function and graph the function.
π(π₯) =π₯2+π₯β6
β4π₯2β16π₯β12
x-intercepts: ________________________
y-intercepts: ________________________
holes: _____________________________
vertical asymptotes: __________________
horizontal asymptotes: ________________
Alg II - Rationals ~15~ NJCTL.org
PMI Rational Expressions, Equations and Functions- SOLUTIONS:
Variation: Classwork:
1. π = 48; π¦ = β8 2. π = 24; π₯ = β12 3. π = 75; π¦ = 8.3
4. π =0.6
54
5. π = 3; π¦ = β36 6. π = 4; π₯ = 6 7. π = π; π = 3
Variation: Homework:
8. π = 36; π¦ = β6 9. π = 40; π₯ = β20 10. π = 48; π¦ = 5.3 11. π = 0.5; π = 6 12. π = 2; π¦ = β36 13. π = β5; π₯ = β6 14. π = π; π = 4
Reducing Rational Expressions: Classwork:
15. π₯
2
16. 10
3
17. 3π₯
18. 9
7π2π4
19. 15π
4π
20. 2(2π2 β 1)
21. 4
3
22. 5
4
23. π£ β 2
π£ + 2
24. π + 4
π β 5
25. βπ 2β 3π
2
26. 2π β 3
3π β 2
27. 2π₯ + 3
π₯2(π₯ + 1)
28. π₯(3π₯ + 1)
3(π₯ β1)
29. 2(π β 1)
30. 3π β 2
π β 2
31. 2(π + 3)
32. π₯2β π₯π¦ + π¦2
2(π₯ β π¦)
33. 3(ππ + 1)
π
34. 5π₯ β 1
π₯2
35. β3π + 2
4
36. β2π₯ + 3
2(π₯ β 2)
Reducing Rational Expressions: Homework:
37. 3π¦
2
38. 3
39. 3
2π₯
40. 2
ππ6
41. 5π2
π2
42. 4π2β3
2
43. 2πβ1
3πβ7
44. 4
3
45. π£ β 1
π£ + 3
46. π + 3
π β 8
47. π (ππ β1)(ππ β3)
3βπ
48. 4π + 1
3π + 2
49. π₯ + 1
π₯
50. π2 + ππ + π2
6π
51. 4
π + π
52. 2π
53. 2(3π₯ β 1)
π₯2(π₯ + 1)
54. π2(3π β π)
2π + π
55. π₯ β 4
π₯2π¦2(π₯ β 2)
56. β2π2
2π + 3
57. β π β 2
2(π + 3)
58. β1
4π₯ + 1
Alg II - Rationals ~16~ NJCTL.org
Multiplying & Dividing Rational Expressions Class Work:
59. 22π₯2
3
60. 3ππ
2π5π
61. πβ2
π+π
62. (π+2)(πβ4)
2(π+1)(π+3)
63. π + 2
β β 1
64. 7
45
65. 9π2
2
66. πβ1
2π+3π
67. πβ2
(π+3)(π+2)
68. 1
2(π+2)
69. (π+1)2
(π+5)(π+2)2
70. 9π3
4π13
71. π₯2 + 3π₯ + 9
2
72. β3π β 1
π + 3
73. π(π + π)
74. 1
3
75. 2π β 3
2(π + 3)
76. βπ₯ β 2
(π₯ + 3)(3π₯ β1)
77. 3(2π₯+1)
π₯+1
Multiplying & Dividing Rational Expressions Homework
78. 33
4ππ 8
1
4
79. 9π4
π3
80. π+2
(π+π)2
81. π+5
2(π+1)
82. (β+3)(β+7)
(πβ4)(ββ3)
83. 1
12
84. 9π
2
85. π+1
πβ1
86. π β 3
(π + 4)(π β1)
87. (π+1)(π+2)
πβ2
88. π+2
(π+3)2
89. 5
3π10π7
90. 2π₯ + π¦
2
91. 2π β π
π(3π β π)
92. 10
π(π + π)
93. (2π₯ β 5)(3π₯ β 5)
(4π₯ β 1)(2π₯ + 3)
94. β1
π₯ + 5
95. βπ(π + 2)2
96. 1
2
Adding & Subtracting Rational Expressions Classwork
97. 4
π₯
98. π¦
99. π§β1
2
100. 1 101. 3 102. -1
103. 5π₯β4
(π₯+4)(π₯β4)
104. β2π₯2β6π₯+5
(π₯β3)(π₯+3)
105. 11π₯+2
(π₯+2)2(π₯β2)
106. 6π₯β17
(π₯β4)(π₯β3)
107. 6π₯β19
(π₯β2)(π₯β3)(π₯+5)
108. 3π₯2+12π₯π¦ β π₯ + 4
π₯2 + 4π¦
109. β2π₯2 + 7
π₯(3π₯β1)
110. βπ + 14
π β 6
111. β5π₯(π₯ β 1)
π₯ β 4
112. 2π₯3β 2π₯2+ 14π₯ β 9
(2π₯ β 3)(π₯ β 1)(π₯ + 2)
113. β15π¦2+ 6π¦ + 9
3π¦ + 2
Alg II - Rationals ~17~ NJCTL.org
Adding and Subtracting Rational Expressions Homework
114. 4π₯
115. π¦
116. 5π§β2
3
117. 1
118. 2(π£+4)
2π£+3
119. 6(π’β2)
2π’β1
120. 2(3π‘+1)
(π‘+1)(3π‘+1)
121. β2π₯2+4π₯+5
(π₯β2)(π₯β3)
122. 11π₯+3
(π₯+3)2(π₯β3)
123. 3(2π₯+1)
(π₯+3)(π₯β6)
124. 6π₯+25
(π₯β1)(π₯+4)(π₯β3)
125. 10π₯ β 5
3π₯ β 2
126. 14π₯ β 5
2π₯(π₯ β 3)
127. β7π + 3
π β 4
128. β2(7π β 3)
2π β 3
129. β18π2+ 33π + 3
(4π β 1)(4π + 1)(2π β 1)
130. β3π¦3 + 6π¦2 β10π¦ + 7
(2π¦ + 1)(3π¦ β 1)(π¦ β 1)
Solving Rational Equations Class Work
131. β13
132. 13
4ππ 3
1
4
133. β2
134. 4
5,
3
2
135. β17
5
136. β3
7
137. β16
138. 5Β±β69
2
139. 19Β±β2811
4
140. No Solution
141. β11
18
142. 2
143. 11 Β± β73
4
Solving Rational Equations Homework
144. 13
3
145. 2 146. 7
147. 3(5Β±β105)
20
148. 12
5
149. 38
11
150. 27
5
151. No Solution
152. β7Β±πβ55
4
153. Β±2
154. 2
7
155. β3 Β± β15
2
156. 3
8
Alg II - Rationals ~18~ NJCTL.org
Graphing Rational Equations Classwork:
157. π(π₯) =2
π₯β1
x-intercepts: None y-intercepts: π¦ = 2
Holes: None
Vertical asymptotes: π₯ = 1
Horizontal asymptotes: π¦ = 0
158. π(π₯) =β3
π₯+2
x-intercepts: None
y-intercepts: π¦ = β1.5
Holes: None
Vertical asymptotes: π₯ = β2
Horizontal asymptotes: π¦ = 0
159. β(π₯) =π₯+1
π₯2β1
x-intercepts: None
y-intercepts: π¦ = β1
Holes: π₯ = β1
Vertical asymptotes: π₯ = 1 Horizontal asymptotes: π¦ = 0
160. π(π₯) =π₯β1
(π₯β1)(π₯+2)
x-intercepts: None
y-intercepts: π¦ =1
2
Holes: π₯ = 1
Vertical asymptotes: π₯ = β2
Horizontal asymptotes: π¦ = 0
Alg II - Rationals ~19~ NJCTL.org
161. π(π₯) =π₯2+5π₯+6
π₯2+3π₯+2
x-intercepts: π₯ = β3
y-intercepts: π¦ = 3
Holes: π₯ = β2
Vertical asymptotes: π₯ = β1
Horizontal asymptotes: π¦ = 1
162. β(π₯) =π₯2βπ₯β6
π₯2β5π₯+6
x-intercepts: π₯ = β2
y-intercepts: π¦ = β1
Holes: π₯ = 3
Vertical asymptotes: π₯ = 2
Horizontal asymptotes: π¦ = 1
Graphing Rational Equations Homework:
163. π(π₯) =2
π₯+3
x-intercepts: None
y-intercepts: π¦ =2
3
Holes: None
Vertical asymptotes: π₯ = 3
Horizontal asymptotes: π¦ = 0
164. π(π₯) =β3
π₯β4
x-intercepts: None
y-intercepts: π¦ =3
4
Holes: None
Vertical asymptotes: π₯ = 4
Horizontal asymptotes: π¦ = 0
Alg II - Rationals ~20~ NJCTL.org
165. π(π₯) =π₯+2
(π₯β1)(π₯+2)
x-intercepts: None
y-intercepts: π¦ = β1
Holes: π₯ = β2
Vertical asymptotes: π₯ = 1
Horizontal asymptotes: π¦ = 0
166. β(π₯) =π₯β2
π₯2β4
x-intercepts: None
y-intercepts:π¦ =1
2
Holes: π₯ = 2
Vertical asymptotes: π₯ = β2
Horizontal asymptotes: π¦ = 0
167. π(π₯) =π₯2+9π₯+18
π₯2+7π₯+6
x-intercepts: π₯ = β3
y-intercepts: π¦ = 3
Holes: π₯ = β6
Vertical asymptotes: π₯ = β1
Horizontal asymptotes: π¦ = 1
168. β(π₯) =π₯2+5π₯β14
π₯2+6π₯β7
x-intercepts: π₯ = 2
y-intercepts: π¦ = 2
Holes: π₯ = β7
Vertical asymptotes: π₯ = 1
Horizontal asymptotes: π¦ = 1
Alg II - Rationals ~21~ NJCTL.org
Unit Review - Multiple Choice
1. B.
2. C.
3. A.
4. A.
5. C.
6. A.
7. B.
8. D.
9. D.
10. C.
11. D.
12. A.
Extended Response
1. a. (x - 4)(x +3)
x + 4
b. x3 + 4x2 -16x-64
c. x+3
2.
x-intercepts: (2, 0)
y-intercepts: (0,1
2)
Hole: π₯ = β3
Vertical Asymptote: π₯ = 2
Horizontal Asymptote: π¦ = β1
4