Question

find g(f(x)) if
f(x)=3x-2
g(x)= x+2

Answer 1

x-2(3x-2(x))
=x-2(3x^2-2x)
=3x^3-2x^2+6x^2-4x
=3x^3+4x^2-4x

Answer 2

basically, you take the equation for f(x), and substitute the right hand side wherever you see x in g(x).

f(x) = 3x-2
g(x) = x+2

g(f(x)) = (3x-2) + 2

Answer 3

f(x)=3x-2
g(x)=x+2
g(f(x))=(3x-2)+2
=3x-2+2
=3x