oblicz 2 pierwiatek z 8 + pierwiastek 32 / pierwiastek 98
\frac{2\sqrt8+\sqrt{32}}{\sqrt{98}}=\frac{2\sqrt{4*2}+\sqrt{16*2}}{\sqrt{49*2}}=
=\frac{4\sqrt2+4\sqrt2}{7\sqrt2}=
=\frac{8\sqrt2}{7\sqrt2}=\frac{8}{7}