# How do you simplify ((a^2-b^2)/a)(a/(a^2-2ab+b^2))?

$= \frac{\left(a + b\right) \left(a - b\right)}{a} \cdot \frac{a}{{\left(a - b\right)}^{2}}$
$= \frac{\cancel{a} \cdot \left(a + b\right) \cancel{\left(a - b\right)}}{\cancel{a} \cdot \left(a - b\right) \cancel{\left(a - b\right)}} = \frac{a + b}{a - b}$