\[\boxed{\mathbf{552\ (552).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\sqrt{11 + 4\sqrt{7}} = \sqrt{7} + 2\]
\[\left( \sqrt{11 + 4\sqrt{7}} \right)^{2} = \left( \sqrt{7} + 2 \right)^{2}\]
\[11 + 4\sqrt{7} = 7 + 4\sqrt{7} + 4\]
\[11 + 4\sqrt{7} = 11 + 4\sqrt{7}\]
\[2)\ \sqrt{14 + 8\sqrt{3}} = \sqrt{8} + \sqrt{6}\]
\[\left( \sqrt{14 + 8\sqrt{3}} \right)^{2} = \left( \sqrt{8} + \sqrt{6} \right)^{2}\]
\[14 + 8\sqrt{3} = 8 + 2\sqrt{48} + 6\]
\[14 + 8\sqrt{3} = 14 + 8\sqrt{3}\]