Simplify: 2x2−2x2−1\dfrac{2x^2 - 2}{x^2 - 1}x2−12x2−2 for x≠±1x \neq \pm 1x=±1.
222
2x2x2x
2xx−1\dfrac{2x}{x-1}x−12x
2(x+1)2(x+1)2(x+1)