Question

If f(x) = 3x + 5 and g(x) = –2x^2 – 5x + 3, find (f + g)(x).

A.
(f + g)(x) = –2x^2 – 2x + 8

B.
(f + g)(x) = –2x^2 + 8x + 8

C.
(f + g)(x) = –4x + 8

D.
(f + g)(x) = –2x + 8

Answer 1

Explanation:

f + g is very simple : just add the 2 expressions

(f+g)(x) = 3x + 5 + (-2x² - 5x + 3) = 3x + 5 - 2x² - 5x + 3 =

= -2x² - 2x + 8

so, A is the correct answer.