Question

If F(x) = x - 7 and G(x) = x^3, what is G(F(x))?

Answer 1

Hello, Chuck!  Start with G(x) = x^3.  Now replace "x" in G(x) with "F(x)" and replace "x" in x^3 with "x-7."  That's it.

You could expand G(F(x))=(x-7)^3 if you wish, but that's not strictly necessary.