dudde77 dudde77

18-07-2019
Mathematics

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What is x2+2x-8=0 by factoring ?

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AlephZero AlephZero

22-07-2019

Answer:

(x+4)(x-2)

Step-by-step explanation:

We need to find two numbers that multiply to -8 and add up to 2. These are 4,-2.

Rewrite the polynomial:

x^2-2x+4x-8

and factor each pair:

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

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