Question

Сократите дробь

Пж, надо ну очень срочно!!

Answer 1

$1)\frac{3+\sqrt{3} }{\sqrt{15}+\sqrt{5}}=\frac{(\sqrt{3})^{2}+\sqrt{3}}{\sqrt{5*3}+\sqrt{5}}=\frac{\sqrt{3}(\sqrt{3}+1)}{\sqrt{5}(\sqrt{3}+1)} =\frac{\sqrt{3} }{\sqrt{5} }\\\\2)\frac{x^{2}-3 }{\sqrt{3}x+3 }=\frac{x^{2}-(\sqrt{3})^{2}}{\sqrt{3}x+(\sqrt{3})^{2}}=\frac{(x-\sqrt{3})(x+\sqrt{3})}{\sqrt{3} (x+\sqrt{3})}=\frac{x-\sqrt{3} }{\sqrt{3} }$