multiplying a binomial by a binomial
DESCRIPTION
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. 4a 2 + 3z 3. 2x 2 – 5x 5. -3n 3 – 6n 2 - PowerPoint PPT PresentationTRANSCRIPT
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Multiplying a Binomial by a BinomialThe FOIL Method
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Today’s Objective:
Review homework answers
Multiply a binomial by a binomial using the FOIL method
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Homework # 104 odds Answers
1. 4a2 + 3z 3. 2x2 – 5x 5. -3n3 – 6n2
7. 15x3 – 3x2 + 12x 9. 8b3 + 36b2 – 4b
11.4m4 + 6m3 – 10m2 13. 3w2 + 7w 15. -2p2 + 3p
17.3x3 + 8x 19. -22b2 + 2b + 8 21. a = -7
25. m = -2
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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?
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FIRST
(x + 3)(x – 4)
The terms in red are first terms.
Multiply them. (x)(x) x2
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OUTER
(x + 3)(x – 4)
The terms in red are the outer terms.
Multiply them. (x)(-4) -4x
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INNER
(x + 3)(x – 4)
The terms in red are the inner terms.
Multiply them. (3)(x) 3x
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LAST
(x + 3)(x – 4)
The terms in red are the last terms.
Multiply them. (3)(-4) -12
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Now combine like terms.
First = x2 Outer = -4x Inner = 3x Last = -12
x2 – x – 12
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(x + 3)(x – 4)
F L
O
I
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Classwork
Complete p. 19 as classwork, check answers with Ms. Cruz
Log in to Carnegie
Homework #105 p. 20 odds
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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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