Radicali compusi formula de calcul
$\sqrt{a + \sqrt{b}} = \sqrt{\frac{a + c}{2}} + \sqrt{\frac{a - c}{2}}$
$c = \sqrt{a^{2} - b}$
Atentie: formula radicalilor compusi se aplica doar cu conditia ca:
$c = \sqrt{a^{2} - b}$ sa fie patrat perfect
$\sqrt{a + \sqrt{b}} + \sqrt{a - \sqrt{b}} = \frac{\sqrt{b} + 1 + \sqrt{b} - 1}{\sqrt{a}} =>$