Question

If F(x) = 3x + 1 and G(x) = x2 + 2, what is F(G(x))?

Answer 1

This means you plug in the function g(x) wherever a x exists in your function f(x). So namely \[f(g(x)) = 3(x^2+2)+1\]

Answer 2

By plugging that in and expanding then condensing you'd have
3x^2+7

Answer 3

Simple f(g(x))= 3x^2+7