Question

Помогите упростить,плиииииииииз))

Answer 1

$1)\frac{\sqrt{c} }{\sqrt{c}+\sqrt{d}}+\frac{\sqrt{d}}{\sqrt{c}-\sqrt{d}}=\frac{c-\sqrt{cd}+\sqrt{cd} +d}{(\sqrt{c} +\sqrt{d})(\sqrt{c}-\sqrt{d})} =\frac{c+d}{c-d}\\\\2)\frac{\sqrt{cd} }{c+d}*\frac{c+d}{c-d}=\frac{\sqrt{cd}}{c-d}$