Question

$frac{1}{ sqrt{11} } - sqrt{2} + frac{1}{ sqrt{11} } + sqrt{2} - frac{ 2sqrt{11} }{9}$

Answer 1

$=2* frac{1}{ sqrt{11} } +0* sqrt{2}- frac{2 sqrt{11} }{9}= frac{2*9-2* (sqrt{11})^2 }{9 sqrt{11} } = -frac{4}{9 sqrt{11} } =- frac{4 sqrt{11} }{99}$