Question

Composition of functions

Answer 1

10x^2 - 18.

Explanation:

We replace the x in g(x) by f(x):

g(x) = 5x + 7 so:

g(f(x)) = 5(2x^2 - 5) + 7.

Now we simplify:

10x^2 - 25 + 7

= 10x^2 - 18.