Ответ:

а) \(\frac{1}{2}\sqrt{24}=\frac{1}{2}\sqrt{4\cdot6}=\frac{1}{2}\cdot2\sqrt{6}=\sqrt{6}\).

б) \(\frac{2}{3}\sqrt{45}=\frac{2}{3}\sqrt{9\cdot5}=\frac{2}{3}\cdot3\sqrt{5}=2\sqrt{5}\).

в) \(-\frac{1}{7}\sqrt{147}=-\frac{1}{7}\sqrt{49\cdot3}=-\frac{1}{7}\cdot7\sqrt{3}=-\sqrt{3}\).

г) \(-\frac{1}{5}\sqrt{275}=-\frac{1}{5}\sqrt{25\cdot11}=-\frac{1}{5}\cdot5\sqrt{11}=-\sqrt{11}\).

д) \(0,1\sqrt{20000}=0,1\sqrt{10000\cdot2}=0,1\cdot100\sqrt{2}=10\sqrt{2}\).

е) \(-0,05\sqrt{28800}=-0,05\sqrt{14400\cdot2}=-0,05\cdot120\sqrt{2}=-6\sqrt{2}\).