Question

...............
niste indicatii va rog

Answer 1

As simple as that.........

Answer 2

Incearca cu formula radicalilor compusi:

$\sqrt{a-\sqrt{b} } =\sqrt{\frac{a+\sqrt{a^{2}-b } }{2} } -\sqrt{\frac{a-\sqrt{a^{2}-b } }{2} }$