Question

вычислите пожалуйста

Answer 1

Ответ:

$\sqrt{a^2}=|a|\\1)\sqrt{(\frac{7}{10})^2 } =|\frac{7}{10} |=\frac{7}{10}\\2)\frac{2}{3}\sqrt{(-4,2)^2}=\frac{2}{3}|-4,2|=\frac{2}{3}*\frac{21}{5}=2*\frac{7}{5}=\frac{14}{5}=2.8\\ 3)\sqrt{(-2,5)^2}=|-2,5|=2,5\\4)-\frac{5}{6}\sqrt{3,6^2}=-\frac{5*36}{6*10}=-\frac{6}{2}=-3\\5)2,2\sqrt{3,5^2}=2,2*3,5=\frac{22*35}{10*10}=\frac{11*7}{2*5}=\frac{77}{10}\\6)-\frac{3}{7}\sqrt{(-5,6)^2}=-\frac{3}{7}*|-5,6|=-\frac{3}{7}*\frac{56}{10}=-\frac{24}{10}=-2,4$