Question

If f(x) = 4x – 1 and g(x) = x2 + 2x + 2, what is f(g(x)) ?
Answer:
A)4x^2 + 8x + 7
B)x^2 + 8x – 2
C)4x^2 + 6x – 1
D)x^2 + 6x + 1
please help:)

Answer 1

f(x) = 4x – 1
g(x) = x^2 + 2x + 2
f(g(x))=4(x^2 + 2x + 2) - 1
f(g(x))=4x^2 + 8x + 8 - 1
f(g(x))=4x^2 + 8x + 7

So, it's A. :)