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If f(x) = 3x + 5 and g(x) = -2x2 – 5x + 3, find (f + g)(x).=A. (f+ g)(x) = -2x2 + 8x + 8=B. (f+ g)(x) = -2x + 8O c. (f+ g)(x) = -2x2 - 2x + 8-O D. (f+ g)(x) = -4x+8

User JohannesD
by
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1 Answer

4 votes

Given:


f(x)=3x+5\text{ and }g(x)=-2x^2=5x+3.

Aim:

We need to find (f+g)(x).

Step-by-step explanation:

We know that


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

Substitute know values.


(f+g)(x)=(3x+5)+(-2x^2+5x+3)


(f+g)(x)=3x+5-2x^2+5x+3

Add like terms that have the same variable with the same power of the variable.


(f+g)(x)=-2x^2+5x+3x+3+5


(f+g)(x)=-2x^2+8x+8

Final answer:


(f+g)(x)=-2x^2+8x+8

User Sam Routledge
by
6.8k points
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