Question

F(x) = 5x³ + 2x² - 7x +4

g(x) = 3x - 7
Find (f + g)(x).

A. (f+g)(x) = 5x³ + 2x² - 4x + 3
B. (f+g)(x) = 5x³ + 2x² - 10x - 3
C. (f+g)(x) = 5x³ + 2x² - 4x - 3
D. (f+g)(x) = 5x³ + 2x² - 10x + 3

Answer 1

Choice C

5x³ + 2x² - 4x - 3

Explanation:

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

So simply add the two terms together

5x³ + 2x² - 7x + 4
+ 3x - 7
--------------------------
5x³ + 2x² - 4x - 3