Find f g x if f x x 2 6x 9 and g x 2x 6 homework help

Find (f + g)(x) if f(x) = x^2 + 6x + 9 and g(x) = 2x + 6.

A. 9x^2 + 15

B. x^2 + 8x + 15

C. 81x^2 + 15

D. 24x

 
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