Question

упростите выражение х√у-у√у/2. СРОЧНО, ОТВЕТЬЕ РАДИ БОГА ​

Answer 1

Ответ:

$- \sqrt{y} \times x$

Answer 2

$\frac{x\sqrt{y}-y\sqrt{y}}{2}*(\frac{\sqrt{x}}{\sqrt{x}+\sqrt{y}}+\frac{\sqrt{x}}{\sqrt{x}-\sqrt{y}}})=\frac{\sqrt{y}(x-y) }{2}*\frac{\sqrt{x}(\sqrt{x}-\sqrt{y})+\sqrt{x}(\sqrt{x}+\sqrt{y})}{(\sqrt{x}+\sqrt{y})(\sqrt{x}-\sqrt{y})} =\\\\=\frac{\sqrt{y}(x-y) }{2}*\frac{x-\sqrt{xy}+x+\sqrt{xy}}{(\sqrt{x})^{2}-(\sqrt{y})^{2}}=\frac{\sqrt{y}(x-y) }{2}*\frac{2x}{x-y}=x\sqrt{y}$