SOLUTION: Rewrite the middle term as the sum of two terms and then factor by grouping. x^2 + 2x – 80

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Rewrite the middle term as the sum of two terms and then factor by grouping. x^2 + 2x – 80       Log On


   

Question 78832: Rewrite the middle term as the sum of two terms and then factor by grouping.
x^2 + 2x – 80



Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Rewrite the middle term as the sum of two terms and then factor by grouping.
x^2 + 2x – 80
Find two numbers whose product is -80 and whose sum is 2:
The numbers are +10 and -8
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Rewrite:
x^2+10x-8x-80
x(x+10)-8(x+10)
(x+10)(x-8)
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Cheers,
Stan H.