Question

Given the definitions of f(x) and g(x) below, find the value of g(f(-1)).

f(x) = 3x² + 5x – 7
g(x) = 2x + 13

Answer 1

-5

Explanation:

At first,

f(-1) = 3 x (-1)² + 5 x (-1) -7

= 3 - 5 - 7

= -9

g(f(-1)) = g(-9)

= 2 x (-9) + 13

= -18 + 13

= -5