Question 1047329
<i>The part where I should simplify is what I do not understand. 
what I did is: g(2a)=(2a)^2-2(2a)</i>


{{{g(2a)=(2a)^2-2(2a)}}}
{{{(2a)(2a)-2(2a)}}}
{{{2*a*2*a-2*2a}}}
{{{2*2*a*a-2*2a}}}
{{{4a^2-4a}}}