\[\frac{a + b}{\sqrt{\text{ab}} - b} - \frac{2\sqrt{a}}{\sqrt{a} - \sqrt{b}} =\]
\[= \frac{a + b}{\sqrt{b}\left( \sqrt{a} - \sqrt{b} \right)} - \frac{2\sqrt{a}}{\sqrt{a} - \sqrt{b}} =\]
\[= \frac{a + b - 2\sqrt{a} \cdot \sqrt{b}}{\sqrt{b}\left( \sqrt{a} - \sqrt{b} \right)} =\]