Question

$$\frac{ { a }^{ 2 } - { b }^{ 2 } }{ { a }^{ 2 } -ab } / \frac{ 2a-2b }{ ab }$$

Evaluate

$\frac{b\left(a+b\right)}{2\left(a-b\right)}$

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Expand

$-\frac{ab+b^{2}}{2\left(b-a\right)}$

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