SOLUTION: Factor the following trinomials: X^2 + 8X +7 x ^2 - 10x + 9

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Question 431930: Factor the following trinomials:
X^2 + 8X +7
x ^2 - 10x + 9

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
factoring
X^2 + 8X + 7 = (X+1)(X+7)
CHECKING: (OUTSIDE PRODUCT + INSIDE PPRODUCT = 8X)
F First terms X^2
O Outside terms 7X
I Inside terms X
L Last terms 7
x ^2 - 10x + 9 = (x-9)(x-1)
CHECKING: (OUTSIDE PRODUCT + INSIDE PPRODUCT = -10x)
F First terms x^2
O Outside terms -x
I Inside terms -9x
L Last terms 9