Question

Radical din 20 - 10/radical din 5 - (1/2) la puterea -2

Answer 1

$\sqrt{20} - \frac{10}{ \sqrt{5} } - (\frac{1}{2})^-2 = 2 \sqrt{5} - \frac{10 \sqrt{5} }{5} - 4 = 2 \sqrt{5} - 2 \sqrt{5} - 4 = -4.$