Tính: `\sqrt(3-\sqrt5):\sqrt2`

`sqrt{3 - sqrt{5}} : sqrt{2}`

`= sqrt{(3 - sqrt{5}) : 2}`

`= sqrt{(3-sqrt{5})/2}`

`= sqrt{(3-sqrt{5})}/sqrt{2}`

`= sqrt{(3-sqrt{5})}/sqrt{2} * sqrt{2}/sqrt{2}`

`= sqrt{(3-sqrt{5}sqrt{2})}/(sqrt{2}sqrt{2})`

`= sqrt{(3-sqrt{5}). 2}/2`

`= sqrt{(6-2sqrt{5})}/2`

`= sqrt{(1-sqrt{5})^2}/2`

`= (sqrt{5}-1)/2`

$# 𝓖𝓻𝓮𝓮𝓷$