8-3 multiplying polynomials again goal: multiply polynomials using the foil method eligible content:...
TRANSCRIPT
8-3 MULTIPLYING POLYNOMIALS AGAIN
Goal: • Multiply polynomials using the FOIL
method
Eligible Content:• A1.1.1.5.1
Vocabulary
FOIL Method – a method that can be used to multiply 2 binomials together.
If you like the Box Method, you can still use it.
FOIL
F – first term in each parentheses
O – outside terms
I – inside terms
L – last term in each parentheses
)25)(23( xx
Multiply using the FOIL method
215x x6 x10 4
x4215x 4
F O I L
Examples
1. (3x + 2)(2x + 4)
2. (y + 6)(2y – 5)3. (2k – 8)(k – 7)4. (-2n + 4)(3n +
5)5. (x + 2)(x – 9)
6x2 + 16x + 8 2y2 + 7y – 30 2k2 – 22k + 56 -6n2 + 2n + 20 x2 – 7x – 18
A. c2 – 6c + 8
B. c2 – 4c – 8
C. c2 – 2c + 8
D. c2 – 2c – 8
Find (c + 2)(c – 4).
A. 4x2 – 11x – 3
B. 4x2 + 11x – 3
C. 4x2 + 13x – 3
D. 4x2 + 12x – 3
Find (x + 3)(4x – 1).
A. x2 + x – 6
B. x2 – x – 6
C. x2 + x + 6
D. x2 + x + 5
Find (x + 2)(x – 3).
A. 5x2 – 8x + 30
B. 6x2 + 28x – 1
C. 6x2 – 8x – 30
D. 6x – 30
Find (3x + 5)(2x – 6).
Practice
Worksheet – “8-3 Multiplying Binomials using the FOIL Method.”
Homework
Page 483 #12-23