Question

Calculatii; a) 5+ 2 radical 5 /  2 radical 5 -  3 radical din 5 + 5 /  3 radical 5 ori 3 radical din 10 /5.​

Answer 1

Răspuns:

$\frac{5 + 2 \sqrt{5} }{2 \sqrt{5} } - \frac{3 \sqrt{5} + 5 }{3 \sqrt{5} } \times \frac{3 \sqrt{10} }{5} = \frac{5 \sqrt{5} + 10 }{10} - \frac{3 \sqrt{10} + 5 \sqrt{2} }{5} = \frac{ \sqrt{5} + 2}{2} - \frac{3 \sqrt{10} + 5 \sqrt{2} }{5}$