Question

Помогите пожалуйста)))Ради бога.

Answer 1

$(\frac{5}{2})^{2} :(-\frac{25}{4})*(\frac{5}{2})^{o}*\frac{2}{5}=-\frac{5^{2} }{2^{2} }*\frac{2^{2} }{5^{2} }*1*\frac{2}{5}=-1*1*\frac{2}{5}=-\frac{2}{5}=-0,4$