Question

Answer question number 18 please !​

Answer 1

It seems that there is something wrong in the question .

$x=\frac{5-\sqrt{3}}{5+\sqrt{3}}\\\\y=\frac{5+\sqrt{3}}{5-\sqrt{3}}\\\\x-y=\frac{5-\sqrt{3}}{5+\sqrt{3}}-\frac{5+\sqrt{3}}{5-\sqrt{3}}\\\\\implies \frac{(5-\sqrt{3})^2-(5+\sqrt{3})^2}{5^2-(\sqrt{3})^2}\\\\\implies \frac{25+3-25-3-10\sqrt{3}-10\sqrt{3}}{25-3}$

$\implies \frac{-20\sqrt{3}}{22}\\\\\implies -\frac{10\sqrt{3}}{11}$

Hence proved !

Answer 2

heya..

here is ua answer in attachment.