Simplify 1x2+2x+1x2−4\frac{1}{x^2+2x} + \frac{1}{x^2-4}x2+2x1+x2−41.
2x−2x(x+2)(x−2)\frac{2x-2}{x(x+2)(x-2)}x(x+2)(x−2)2x−2
2x+2x(x+2)(x−2)\frac{2x+2}{x(x+2)(x-2)}x(x+2)(x−2)2x+2
2x(x+2)(x−2)\frac{2}{x(x+2)(x-2)}x(x+2)(x−2)2
1x(x−2)\frac{1}{x(x-2)}x(x−2)1