Question

Да 2020 118 (на листочке ) хотя-бы половину ​

Answer 1

$1)\frac{15+2\sqrt{26}}{\sqrt{13}+\sqrt{2}} =\frac{13+2\sqrt{26}+2}{\sqrt{13}+\sqrt{2}}=\frac{(\sqrt{13})^{2} +2*\sqrt{13}*\sqrt{2}+(\sqrt{2})^{2}}{\sqrt{13}+\sqrt{2}} =\frac{(\sqrt{13}+\sqrt{2})^{2}}{\sqrt{13}+\sqrt{2}}=\sqrt{13}+\sqrt{2}\\\\Otvet:\boxed{\sqrt{13}+\sqrt{2}}$

$2)\frac{14-2\sqrt{33}}{\sqrt{11}-\sqrt{3}}=\frac{11-2\sqrt{33}+3}{\sqrt{11}-\sqrt{3}}=\frac{(\sqrt{11})^{2}-2*\sqrt{11}*\sqrt{3}+(\sqrt{3})^{2}}{\sqrt{11}-\sqrt{3}}=\frac{(\sqrt{11}-\sqrt{3})^{2}}{\sqrt{11}-\sqrt{3}}=\sqrt{11}-\sqrt{3}\\\\Otvet:\boxed{\sqrt{11}-\sqrt{3}}$

$3)\frac{\sqrt{30}+\sqrt{6}-\sqrt{5}-1}{\sqrt{5}+1 }=\frac{(\sqrt{6*5}+\sqrt{6})-(\sqrt{5}+1) }{\sqrt{5}+1}=\frac{\sqrt{6}(\sqrt{5}+1)-(\sqrt{5}+1)}{\sqrt{5}+1}=\frac{(\sqrt{5}+1)(\sqrt{6}-1) }{\sqrt{5}+1}=\sqrt{6}-1\\\\Otvet:\boxed{\sqrt{6}-1}$

$4)\frac{\sqrt{14}+\sqrt{7}-2\sqrt{2}-2}{\sqrt{7}-2}=\frac{(\sqrt{14}-2\sqrt{2})+(\sqrt{7}-2)}{\sqrt{7}-2} =\frac{\sqrt{2}(\sqrt{7}-2)+(\sqrt{7}-2)}{\sqrt{7}-2}=\frac{(\sqrt{7}-2)(\sqrt{2}+1)}{\sqrt{7}-2}-2}=\sqrt{2}+1\\\\Otvet:\boxed {\sqrt{2}+1}$