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Algbrea 2 Math

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1 Answer

Hi again David;
x2-9x+8
We can factor this.
For the FOIL...
FIRST must be (x)(x)=x2
OUTER and INNER must add-up to -9x
LAST must be (8)(1) or (1)(8) or (4)(2) or (2)(4), and both numbers must be negative.
(x-8)(x-1)
FIRST...(x)(x)=x2
OUTER...(x)(-1)=-1x=-x
INNER...(-8)(x)=-8x
LAST...(-8)(-1)=8
x2-x-8x+8
x2-9x+8