Simplify: x3−27x2−9\frac{x^3 - 27}{x^2 - 9}x2−9x3−27.
x2+3x+9x+3\frac{x^2+3x+9}{x+3}x+3x2+3x+9
x−3x+3\frac{x-3}{x+3}x+3x−3
x2−3x+9x−3\frac{x^2-3x+9}{x-3}x−3x2−3x+9
x2+9x+3\frac{x^2+9}{x+3}x+3x2+9