Question

Consider these functions:
f(x)=5x^2+2
g(x)=x^2-1
what is the value of g(f(-1))?

Answer 1

48

Explanation:

First plug in -1 to f(x):

f(-1)=5(-1)^2+2

f(-1)=7

Then, plug in the answer or f(-1) (which is 7) to g(x):

g(f(-1))= 7^2-1

The answer is 48.