Question

Urgente Matematica Agora

Answer 1

RESPOSTA: $\frac{2\sqrt{5} }{5}$

$\frac{2}{\sqrt{5}}=\frac{2}{\sqrt{5}}.\frac{\sqrt{5} }{\sqrt{5}}=\frac{2\sqrt{5}}{\sqrt{5} \sqrt{5}}=\frac{2\sqrt{5}}{5}$