Simplify x2+x−12x2−9\frac{x^2+x-12}{x^2-9}x2−9x2+x−12.
x+4x+3\frac{x+4}{x+3}x+3x+4
x−4x−3\frac{x-4}{x-3}x−3x−4
x+4x−3\frac{x+4}{x-3}x−3x+4
x−4x+3\frac{x-4}{x+3}x+3x−4