Question 727475


{{{a^2+12ab+27b^2}}}....write {{{12ab}}} as {{{9ab+3ab}}}

{{{a^2+9ab+3ab+27b^2}}}...group

{{{(a^2+9ab)+(3ab+27b^2)}}}

{{{a(a+9b)+3b(a+9b)}}}

{{{(a+3b)(a+9b)}}}