[tex]2\sqrt{4} = 2\sqrt{2^{2}} = 2\cdot(2^{2})^{\frac{1}{2}} = 2\cdot2^{2\cdot\frac{1}{2}} = 2\cdot2^{1} = 2\cdot2\cdot2 = 4[/tex]
Wyjaśnienie
[tex](a^{m})^{n} = a^{m\cdot n}[/tex]
