Question

Сократите дробь : √x+√y/x-y

Answer 1

$(\sqrt{x})^2=x\; \; ,\; \; \; (\sqrt{y} )^2=y\\\\ \frac{\sqrt{x}+\sqrt{y} }{x-y}= \frac{ \sqrt{x} +\sqrt{y} }{(\sqrt{x} -\sqrt{y})(\sqrt{x}+\sqrt{y})}= \frac{1}{ \sqrt{x} -\sqrt{y}}$