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Find the expression of equivalent to (x-1)(x-9)
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2 votes
Find the expression of equivalent to (x-1)(x-9)

User Derrek
by
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2 Answers

4 votes
foil aka distribute

FOIL
First
Outer
Inner
Last

First: x times x=x²
Outer: x times x times -9=-9x
Inner: -1 times x=-1x
last: -1 times -9=9
add them

x²-9x-1x+9=
x²-10x+9
User Martin Cron
by
6.3k points
2 votes
(x-1)(x-9)
=x^2 -9x -x + 9
=x^2 -10x + 9
User Sato
by
5.5k points
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