Question

rút gọn giúp em ạ:

\(\sqrt{5-2\sqrt{6}}\)

Answer 1

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

Answer 2

`sqrt(5 - 2 sqrt 6) = sqrt(2 - 2 sqrt 6 + 3)`

`= sqrt (2 - sqrt 3)^2`

`= | sqrt 3 - 2|`

`= 2 - sqrt 3.`