Question 150885
{{{f(x)=3x+2}}}
{{{g(x)=x^2}}}
Substitute f(x) for x in g(x).
{{{g(f(x))=(f(x))^2}}}
{{{g(f(x))=(3x+2)^2}}}
{{{g(f(x))=9x^2+12x+4}}}