Ответ:\(\sqrt{6\cdot54}=\sqrt{324}=18\).\(\sqrt{11\cdot44}=\sqrt{484}=22\).\(\sqrt{4{,}9\cdot19{,}6}=\sqrt{96{,}04}=9{,}8\).\(\sqrt{2560\cdot3{,}6}=\sqrt{9216}=96\).Ответ: 1) 18; 2) 22; 3) 9,8; 4) 96.