Question

найти значения выражения

Answer 1

$\displaystyle\bf\\1)\\\\\frac{\sqrt{7,2} }{\sqrt{0,2} } =\sqrt{\frac{7,2}{0,2} } =\sqrt{\frac{72}{2} } =\sqrt{36} =\sqrt{6^{2} } =6\\\\\\2)\\\\\frac{\sqrt{1,8} }{\sqrt{12,8} } =\sqrt{\frac{1,8}{12,8} }=\sqrt{\frac{18}{128} } =\sqrt{\frac{9}{64} } =\sqrt{\Big(\frac{3}{8}\Big)^{2} } =\frac{3}{8} =0,375\\\\\\3)\\\\\frac{\sqrt{2,5} }{\sqrt{40} } =\sqrt{\frac{25}{400} } =\sqrt{\Big(\frac{5}{20}\Big)^{2} } =\frac{5}{20} =0,25$