Question

Cho em hỏi ngu là cách rút gọn bài này ạ

Answer 1

Answer 2

\(\sqrt{5-2\sqrt{6}}-\sqrt{5+2\sqrt{6}}\\ =\sqrt{\left(\sqrt{3}-\sqrt{2}\right)^2}-\sqrt{\left(\sqrt{3}+\sqrt{2}\right)^2}\\ =\left|\sqrt{3}-\sqrt{2}\right|-\left|\sqrt{3}+\sqrt{2}\right|\\ =\sqrt{3}-\sqrt{2}-\sqrt{3}-\sqrt{2}\\ =-2\sqrt{2}\)

Answer 3

c: Ta có: \(\sqrt{5-2\sqrt{6}}-\sqrt{5+2\sqrt{6}}\)

\(=\sqrt{3}-\sqrt{2}-\sqrt{3}-\sqrt{2}\)

\(=-2\sqrt{2}\)