Simplify: 2a−2ba2−b2\dfrac{2a - 2b}{a^2 - b^2}a2−b22a−2b.
2a+b\dfrac{2}{a+b}a+b2
2a−b\dfrac{2}{a-b}a−b2
2(a−b)2(a-b)2(a−b)
2aa2−b2\dfrac{2a}{a^2-b^2}a2−b22a