Question

MEDAL!!
If h(x)=(fog)(x) and h(x)=3(x+2)^2, find f(x) and g(x)
A. f(x)=3x^2 & g(x)=(x+2)^2
B. f(x)=(x+2)^2 & g(x)=3x^2
C. f(x)=x+2 & g(x)=3x^2
D. f(x)=3x^2 & g(x)=x+2

Answer 1

i suppose it is D because if we take g(x)=y=x+2

than f(y)=3y^2
=3(x+2)^2
=h(x)
=fog(x)