Question

For f(x)=4x+1 and g(x) = x2-5, find (f+g)(x)
A. x2+4x-4 B. x2+4x+6 C. 4x2-19 D. 4x3-4

Answer 1

A

Explanation:

(f + g)(x) = f(x) + g(x) , thus

f(x) + g(x)

= 4x + 1 + x² - 5 ← collect like terms

= x² + 4x - 4 → A