Question

Cum rezolv?
$\sqrt{13 - 4 \sqrt{3} }$

Answer 1

4√3=2ab |:2
2√3=ab
a^2-b^2
a=2√3
b=√1
verificam (2√3)^2+1=4×3+1=13
deci 13-4√3=(2√3-1)^2
√(2√3-1)^2=|2√3-1|
cum 2√3>1
√13-4√3=2√3-1