Question

For f(x) = 2x + 1 and g(x) = x2 – 7, find (f + g)(x).

x^2 + 2x + 8
2x ^2– 15
2x^3 – 6
x^2 + 2x – 6

Answer 1

x^2 + 2x - 6.

Explanation:

(f + g)x

= f(x) + g(x)

= 2x + 1 + x^2 - 7

= x^2 + 2x - 6.