February 19, 2017

Homework Help: math,help

Posted by jas20 on Friday, March 2, 2007 at 2:14am.

Can someone show me how step by step how to solve this problem...

Rewrite the middle term as the sum of two terms and then factor by grouping.


step 1. Find two factors which when multiplied will give you -63 and when added will give you -2

how about -9 and +7??

step 2:

rewrite -2x as -9x + 7x

then x^2 - 9x + 7x - 63
find the common factors of the first two terms and the last two terms

x(x-9) + 7(x-9), notice you now have another common factor, the x-9

finally (x-9)[x+7]

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