Question

VA ROGGG,NU ÎNȚELEG ABSOLUT NIMIC … :)))

Answer 1

$( - \frac{5}{2} ) {}^{ - 1} - 2 {}^{ - 1} \times \frac{1}{5} + \frac{0,2}{\sout{ \sqrt{2} }} \times \sout{\sqrt{8}} \\ \\ = - \frac{2}{5} - \frac{1}{2} \times \frac{1}{5} + 0,2 \times \sqrt{4} \\ \\ = - \frac{2}{5} - \frac{1}{10} + 0,2 \times 2 \\ \\ = - \frac{2}{5} - \frac{1}{10} + 0,4 \\ \\ = - \not{\frac{2}{5} } - \frac{1}{10} +\not{ \frac{2}{5} } \\ \\ = - \frac{1}{10}$