Multiplying a Binomial by
a Binomial
The FOIL Method
Today’s Objective:
 Review homework answers
 Multiply a binomial by a binomial using the FOIL method
Homework # 104 odds Answers
1. 4a2 + 3z
3. 2x2 – 5x
7. 15x3 – 3x2 + 12x
5. -3n3 – 6n2
9. 8b3 + 36b2 – 4b
11. 4m4 + 6m3 – 10m2 13. 3w2 + 7w
15. -2p2 + 3p
17. 3x3 + 8x
21. a = -7
25. m = -2
19. -22b2 + 2b + 8
What does FOIL stand for?
FOIL is an acronym that stands for
F – first
O- outer
I – inner
L – last
So what does that help me do?
FIRST
(x + 3)(x – 4)
The terms in red are first terms.
Multiply them. (x)(x)
x2
OUTER
(x + 3)(x – 4)
The terms in red are the outer
terms.
Multiply them. (x)(-4)
-4x
INNER
(x + 3)(x – 4)
The terms in red are the inner
terms.
Multiply them. (3)(x)
3x
LAST
(x + 3)(x – 4)
The terms in red are the last terms.
Multiply them. (3)(-4)
-12
Now combine like terms.
First = x2 Outer = -4x Inner = 3x Last = -12
x2 – x – 12
F
L
(x + 3)(x – 4)
I
O
Classwork
Complete p. 19 as classwork,
check answers with Ms. Cruz
Log in to Carnegie
Homework #105 p. 20 odds
Remember, all these power points
are posted on my website for you
to refer back to when your at home
and have questions.
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