Question

Cum se calculeaza: $\sqrt{a+ \sqrt{b} }$ (+exemple)

Answer 1

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

Answer 2

[tex] \sqrt{a\pm \sqrt{b}}= \sqrt{ \frac{a+c}{2}}\pm \sqrt{ \frac{a-c}{2}},~ unde~ c^{2} =a^{2}-b~sau~c= \sqrt{ a^{2}-b}. \\ Exemplu:~ [/tex]http://matematicaesimpla.com/exemple-formula-radicalilor-compusi/