If f (x) = 4x^2 and g (x) = x+1, find (f * g) (x).

A. 4x^3 + 4x^2

B. 4 (x+1) ^2

C. 4x (x)

D. 4x^2+1

The answer is B. the outside function is f (x) and the inside function is g (x). this means that you will use f (x) to start with. when you come across an ‘x’ in the function, you will insert g (x) in place of it and continue along.