Answer:
10x^2 - 18.
Step-by-step 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.
