Odpowiedź :
[tex]\frac{\sqrt8}{5\sqrt2}=\frac{\sqrt8}{5\sqrt2}*\frac{\sqrt2}{\sqrt2}=\frac{\sqrt{16}}{5*2}=\frac{4}{10}=\frac{2}{5}[/tex]
[tex]\frac{\sqrt8}{5\sqrt2}=\frac{\sqrt8}{5\sqrt2}*\frac{\sqrt2}{\sqrt2}=\frac{\sqrt{16}}{5*2}=\frac{4}{10}=\frac{2}{5}[/tex]