Question 64831
GIVEN f(x)=5x+7 AND g(x)=x^2+7, FIND (g o f)(x).
{{{g(f(x))=g(5x+7)}}}={{{(5x+7)^2+7}}}  Substitute the f function into the g function for x.
{{{(5x+7)(5x+7)+7}}}
{{{25x^2+35x+35x+49+7}}}
{{{25x^2+70x+56}}}
Happy Calculating!!!!