Question

Favor me ajudem!!! 1/raiz de 2 + 1/raiz de 18 – 1/raiz de 8

Answer 1

$\frac{1}{ \sqrt{2} } + \frac{1}{ \sqrt{18} } - \frac{1}{ \sqrt{8} } = \\ \frac{1}{ \sqrt{2} } * \frac{\sqrt{2} }{ \sqrt{2} } +\frac{1}{ \sqrt{18} }*\frac{ \sqrt{18}}{ \sqrt{18} }-\frac{1}{ \sqrt{8} }*\frac{\sqrt{8}}{ \sqrt{8} } =\\ \frac{ \sqrt{2} }{2} + \frac{ \sqrt{18} }{18} - \frac{ \sqrt{8} }{8} = \\ \frac{ 36\sqrt{2}+4\sqrt{18}-9\sqrt{8} }{72}$