Question 138829
Both terms are perfect squares. {{{144r^2}}} = {{{(12r)^2}}}  and {{{81s^2}}} = {{{(9s)^2}}}.

Given: {{{144r^2-81s^2}}}
{{{(12r)^2 - (9s)^2}}}

Which is a 'factored' as I can go with this