Question

va rog frumo foarte urgent
$\sqrt{28-16 \sqrt{3}} + \sqrt{ 19-4 \sqrt{21}}+ \sqrt{16+6 \sqrt{7} }$

Answer 1

√(28-16√3)=√(28-√768)      
√(a-√b)=√[(a+c)/2] - √[(a-c)/2]
c=√(a^2-b)
In cazul tau a=28, b=768, c=√16=4
Maai departe folosesti aceeasi formula la fel.