Question 140679
{{{F(x)=x^2+3}}}
{{{G(x)=5x-2}}}
1. 
{{{(F o G)(x)=(5x-2)^2+3}}}
{{{(F o G)(x)=(25x^2-20x+4)+3}}}
{{{(F o G)(x)=25x^2-20x+7}}}
{{{(F o G)(2)=25(2)^2-20(2)+7}}}
{{{(F o G)(2)=25(4)-40+7}}}
{{{(F o G)(2)=100-40+7}}}
{{{(F o G)(2)=67}}}
2.
{{{(F o F)(x)=(x^2+3)^2+3}}}
{{{(F o F)(x)=(x^4+6x^2+9)+3}}}
{{{(F o F)(x)=x^4+6x^2+12}}}
{{{(F o F)(2)=(2)^4+6(2)^2+12}}}
{{{(F o F)(2)=16+24+12}}}
{{{(F o F)(2)=52}}}
3.
{{{(G o G)(x)=(5(5x-2)-2)}}}
{{{(G o G)(x)=(25x-10)-2}}}
{{{(G o G)(x)=25x-12}}}
{{{(G o G)(2)=25(2)-12}}}
{{{(G o G)(2)=50-12}}}
{{{(G o G)(2)=38}}}