Simplify the expression: x3+27x3−27÷x2−3x+9x2+3x+9\frac{x^3 + 27}{x^3 - 27} \div \frac{x^2 - 3x + 9}{x^2 + 3x + 9}x3−27x3+27÷x2+3x+9x2−3x+9.
x+3x−3\frac{x+3}{x-3}x−3x+3
x−3x+3\frac{x-3}{x+3}x+3x−3
1
(x+3)2(x−3)2\frac{(x+3)^2}{(x-3)^2}(x−3)2(x+3)2