Question

Cum se calculeaza: $\sqrt{a+ \sqrt{b}} =?$

Answer 1

$Este~formula~radicalilor~dubli~(compusi). \\ \\ Daca~ \boxed{c= \sqrt{a^2-b}},~atunci~ \boxed{ \sqrt{a \pm \sqrt{b}}= \sqrt{\frac{a+c}{2} } \pm \sqrt{\frac{a-c}{2}} } ~.$