Question 743057

{{{4a^3+28a^2+40a}}}

{{{4a(a^2+7a+10)}}}....write {{{7a}}} as {{{2a+5a}}}

{{{4a(a^2+2a+5a+10)}}}....group

{{{4a((a^2+2a)+(5a+10))}}}

{{{4a(a(a+2)+5(a+2))}}}

{{{4a(a+5)(a+2)}}}