For f(x) = 4x +1 and g(x) = x2 - 5, find (f + g)(x)

asked Nov 27, 2020 175k views

4 votes

by Sergi

5.1k points

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3 votes

Answer:

$\large\boxed{(f+g)(x)=x^2+4x-4}$

Explanation:

$(f+g)(x)=f(x)+g(x)\\\\f(x)=4x+1,\ g(x)=x^2-5\\\\\text{substitute:}\\\\(f+g)(x)=(4x+1)+(x^2-5)=4x+1+x^2-5=x^2+4x-4$

Icewind answered Dec 3, 2020

5.6k points

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