Question

If F(x) = 4x - 1 and G(x) = x2 + 7, what is G(F(x))?

A. 16x2 + 8
B. 4x3 + 28x - 7
C. 16x2 - 8x + 8
D. 4x3 - 7

Answer 1

In g(x), is that x^2 or 2x?

Answer 2

X^2

Answer 3

You would substitute x as in f(x) in the g(x) function so you would wind up with
(4x-1)^2+7
Then you would expand the square
16x^2-4x-4x+1+7
You would then condense these terms
16x^2-8x+8
So answer choice "c" is correct