Question 266900
{{{(x^2-3x-40)/(x+5)}}}
{{{(x^2-3x-40)}}} is same as {{{(x+5)(x-8)}}} so:
{{{((x+5)(x-8))/(x+5)}}}
{{{(cross(x+5)(x-8))/cross(x+5)}}}
{{{x-8}}}  is the answer