12/2/13 challenge 1. 3x + 6x 2 – 10 + 9x 2 + 2x 2. 5x 2 y + 3xy – 8x 2 y + 6xy 3. 4.(2x 2 )(-4x...
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12/2/13 Challenge
1. 3x + 6x2 – 10 + 9x2 + 2x
2. 5x2y + 3xy – 8x2y + 6xy
3.
4. (2x2)(-4x3)
5. 2(x + 4)
6. 7(12 + 3x) – 102x + 8
-8x5
15x2 + 5x - 10
-3x2y + 9xy
21x + 74
36
2
x
x 3x2
Objective: To classify polynomials by degree and by number of terms
Classifying Polynomials
Example of a Polynomial
5364 23 xxx
Coefficients
Degrees
Constant
Vocabulary
Degree: is the exponent for each variable.
Degree of the polynomial: is the largest exponent of the polynomial.
Leading coefficient: is the coefficient of the first term.
Descending order/Standard form is how polynomials are written where the terms are placed in descending order from largest degree to smallest.
Example: Write the polynomials in Standard form/descending order. Then identify the leading coefficient and degree of the polynomial.
372 35 xxx 1. 237 53 xxx Degree is 7Leading coefficient is 3
2. 124 4 xx 142 4 xxDegree is 4leading coefficient is –2
Classifying Polynomials By Degree
Degree Example Example
Constant 0 6 -3
Linear 1 3x + 4 -7x + 2
Quadratic 2 123 2 xx 46 2 x
Cubic 3 325 23 xx xx 33
Quartic 4 23 34 xx xxx 24 85
Classifying polynomials By # of terms
# of terms Example Example
Monomial 1 3x 27x
Binomial 2 3x + 1 xx 28 3 Trinomial 3 523 26 xx 534 2 xx
Note: Any polynomials with four or more terms are just called polynomials
Adding and Subtracting Polynomials
Adding
• Drop the parentheses and combine like terms.
2 2 2 2a ab 3b 4a ab b
Practice
2 21) (3 7 4) (9 8 4)x x x x
2 22) (8 4 6) ( 4 10)x x x x
Subtracting
• Distribute the negative to all terms in the 2nd parenthesis. This will change all of the signs of each term. Then, combine like terms.
2 2 2 2a ab 3b 4a ab b
Practice2 21) (3 7 4) (9 8 4)x x x x
2 22) (8 4 6) ( 4 10)x x x x
Multiplying Polynomials
Monomial x Polynomial
(5)(x + 6)
5 30x
(x2)(x + 6)
3 26x x
(-2x)(x2 – 4x + 2)
3 22 8 4x x x
Multiplying Polynomials
Binomial x Binomial or Trinomial
Multiplying Polynomials
Using the distributive property
Multiplying Polynomials
F - First
O - Outside
I – Inside
L - Last
(z + 5) (z + 3)
(x - 2) (x + 4)
2 2 8x x
(x + 9) (x – 3)
2 6 27 x x
(x + 3) (x – 3)
2 27x
(2x + 5)(x + 6)
22 17 30 x x
(3x – 1)(2x – 4)
26 14 4 x x
(5b – 6)(3b2 – 2b + 5)This is NOT FOIL!
3 215 28 37 30 b b b
Find the area of the rectangle.
228 96 80 x x
7 10x
4 8x
Find the area of the rectangle.
25 21 4 x x
4x
5 1x
Find the volume.
3 29 18 x x x
3x
6x
x
Practice Worksheet