If f(x)=x/4 -3 and g(x)= 4x^2 +2x-4, find (f+g)(x). A. x^2-12 B. 4x^2 + 9/4x-7 C.4x^2+7/4x-7 D. 4x^2 +9/4x+1

asked Jul 23, 2021 154k views

1 vote

If f(x)=x/4 -3 and g(x)= 4x^2 +2x-4, find (f+g)(x).

A. x^2-12
B. 4x^2 + 9/4x-7 C.4x^2+7/4x-7
D. 4x^2 +9/4x+1

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3 votes

(f+g)x = f(x)+g(x)

Therefore,

$(x)/(4) - 3 + {4x}^(2) + 2x - 4 \\ 4 {x}^(2) + ( (x)/(4) + (8x)/(4) ) - 7 \\ 4 {x}^(2) + (9x)/(4) - 7$

Therefore, the answer is B.

Freakishly answered Jul 29, 2021

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