Question 23650
{{{(2a+b)^2}}} really means {{{(2a+b)*(2a+b) }}}, which is what most people now call a F OI L problem.  Have you had those?  If not, see Chapter 2 of my Basic Algebra: One Step at a Time on my website.


Anyway:
{{{(2a+b)*(2a+b) }}}, 
{{{4a^2 + 2ab+2ab+ b^2}}}

{{{4a^2 + 4ab + b^2 }}}


R^2 at SCC