Question 45465
{{{3p^4  + 16p^3  + 21p^2}}}
{{{p^2(3p^2 + 16p + 21)}}}
{{{p^2(3p + 7)(p + 3)}}}
{{{p(3p^2 + 7p)(p + 3)}}}
length = {{{3p^2 + 7p}}}