Question

If f(x) = 2x - 6 and g(x) = 3x + 9, find (f + g)(x).

Answer 1

(f-g)(x)= -x-15

Explanation:

just did it on apex test

Answer 2

`\large\boxed{(f+g)(x)=5x+3}`

Explanation:

`(f+g)(x)=f(x)+g(x)\\\\f(x)=2x-6,\ g(x)=3x+9\\\\\text{Substitute:}\\\\(f+g)(x)=(2x-6)+(3x+9)\\\\=2x-6+3x+9\qquad\text{combine like terms}\\\\=(2x+3x)+(-6+9)\\\\=5x+3`