Posted by **Jane** on Monday, June 4, 2012 at 4:25pm.

Marna wants to find the values of x for which the funciton below will have a value of 10. f(x) = x^2 + x - 20. Which of the following shows the correct factorization of this funciton for f(x) = 10.

A. (x + 5) (x + 4) = 10

B. (x - 5) (x - 4) = 10

C. (x + 6) (x - 5) = 0

D. (x + 5) (x - 6) = 0

Please explain how you reached that answer.

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