koalarules6 koalarules6

03-01-2017
Mathematics

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Express as a trinomial.
(x−8)(2x+9)

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apologiabiology apologiabiology

03-01-2017

basically expand
use FOIL (a way to remember distributive property)
first outer inner last
that is th eorder to multiply them
First: x times 2x=2x²
Outer: x tmes 9=9x
Inner: -8 times 2=-16x
last: -8 times 9=-72
add them

2x²+9x-16x-72
2x²-7x-72

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