Question

$(\sqrt{5-2 \sqrt{6} }+ \sqrt{5+2\sqrt{6} } ) ^{2}$

Answer 1

(√5-2√6+√5+2√6)²=
(|√6-1)+(√6+1)²=
(√6-1+√6+1)²=
(2√6)²=
2²·√6²=
4·6=24