Simplify dfracx2−156x−12\\dfrac{x^2 - 156}{x - 12}dfracx2−156x−12 for xneq12x \\neq 12xneq12
x+13x + 13x+13
x−12x - 12x−12
x+12x + 12x+12
x−13x - 13x−13