Question

Ajutor dau coroana si 10 puncte​
Problema pe foto

Answer 1

Răspuns:

$\frac{8}{10} \sqrt{5} - \frac{4}{5} \sqrt{5} - \frac{1}{9} \sqrt{5} + \frac{11 - 1}{9} \sqrt{5}$

$\frac{4}{5} \sqrt{5} - \frac{4}{5} \sqrt{5} - \frac{1}{9} \sqrt{5} + \frac{10}{9} \sqrt{5}$

$\frac{9}{9} \sqrt{5} = \sqrt{5}$