Question

Помогите срочно. Упростите выражение​

Answer 1

$1)\frac{a}{\sqrt{ab}-b }-\frac{\sqrt{b}}{\sqrt{b}-\sqrt{a}}=\frac{a}{\sqrt{b}(\sqrt{a}-\sqrt{b}) }+\frac{\sqrt{b}}{\sqrt{a}-\sqrt{b}}=\frac{a+\sqrt{b}*\sqrt{b}}{\sqrt{b}(\sqrt{a}-\sqrt{b}}=\frac{a+b}{\sqrt{b}(\sqrt{a}-\sqrt{b})}\\\\2)\frac{a+b}{\sqrt{b}(\sqrt{a}-\sqrt{b})}*\frac{(\sqrt{a}-\sqrt{b})b}{a+b} =\sqrt{b}\\\\Otvet:\boxed{\sqrt{b}}$