Multiply: a2−b2a+b⋅1a−b\dfrac{a^2 - b^2}{a + b} \cdot \dfrac{1}{a - b}a+ba2−b2⋅a−b1.
111
a−ba - ba−b
a+ba + ba+b
1a2−b2\dfrac{1}{a^2 - b^2}a2−b21