SOLUTION: #22. Factor trinomial 4x^2+7x-2

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Question 749350: #22.
Factor trinomial
4x^2+7x-2
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
We look for a pair of numbers that "add" to 7 and multiply to -8 and discover -1 and 8

4x^2+7x-2=
4x^2+(8x-x)-2=

4x^2+8x-x-2=

(4x^2+8x)-(x+2)=

4x(x+2)-1(x+2)

(4x-1)(x+2)



:)