Question

\frac{x}{y} $\frac{5}{ \sqrt{2} } + \frac{21}{ 3\sqrt{2} } - \frac{99}{ 11\sqrt{2} }$

Answer 1

5/√2+21/3√2-99/11√2=
=5*33/33√2+21*11/33√2-99*3/33√2=
=(165+231+297)/33√2=
=693/33√2=
=21√2