[tex]= \frac{1* \sqrt{2} }{ \sqrt{2} * \sqrt{2} } + \frac{ \sqrt{3} * \sqrt{6} }{ \sqrt{6} * \sqrt{6} }= \frac{ \sqrt{2} }{2}+ \frac{ \sqrt{18} }{6} = \frac{ \sqrt{2} }{2}+ \frac{3 \sqrt{2} }{6}= \frac{3 \sqrt{2} }{6}+ \frac{ 3\sqrt{2} }{6} = \frac{6 \sqrt{2} }{6}= \sqrt{2} [/tex]