areostars29 areostars29
  • 17-02-2017
  • Mathematics
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find the expression of equivalent to (x-1)(x-9)

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Аноним Аноним
  • 17-02-2017
(x-1)(x-9)
=x^2 -9x -x + 9
=x^2 -10x + 9
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apologiabiology
apologiabiology apologiabiology
  • 17-02-2017
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
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