\[\boxed{\mathbf{560\ (560).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{6}{3 + 2\sqrt{3}} + \frac{6}{3 - 2\sqrt{3}} =\]
\[= \frac{18 - 12\sqrt{3} + 18 + 12\sqrt{3}}{\left( 3 + 2\sqrt{3} \right)\left( 3 - 2\sqrt{3} \right)} =\]
\[= \frac{36}{9 - 12} = \frac{36}{- 3} = - 12\]
\[Рациональное\ число.\]
\[2)\ \frac{\sqrt{11} + \sqrt{6}}{\sqrt{11} - \sqrt{6}} + \frac{\sqrt{11} - \sqrt{6}}{\sqrt{11} + \sqrt{6}} =\]
\[= \frac{34}{5} = 6,8\]
\[Рациональное\ число.\]
\[\boxed{\mathbf{5}\mathbf{6}\mathbf{0}\mathbf{\text{.\ }}Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \sqrt{48} - 6 - 4\sqrt{3} =\]
\[= 4\sqrt{3} - 6 - 4\sqrt{6} = - 6;\]
\[2)\ \sqrt{162} - 9\sqrt{2} + \sqrt{27} =\]
\[= 9\sqrt{2} - 9\sqrt{2} + 3\sqrt{3} = 3\sqrt{3}.\]