Question 1009757
{{{x^5y-xy}}} = {{{xy(x^4 - 1)}}} = {{{xy(x^2 + 1)(x + 1)(x - 1)}}}
and
{{{5a^3-10a^2+3a-6}}} = {{{5a^2(a - 2) + 3(a - 2)}}} =
{{{(5a^2 + 3)(a - 2)}}}