Question

G(x) = x+2 (fog) (x) = x²+4 , f(4) = ... ?

Answer 1

F(x)= (x-2)^2 + 4
f(4)=(4-2)^2 + 4
f(4)=2^2 + 4
f(4)=8

Answer 2

Fog (x) = x^2 + 4
fog (x) = (x+2)^2 - 4 (x+2) + 8
f (x) = x^2 - 4x + 8