ét o ét ;-; `\sqrt{6+2\sqrt{5}` `-\(sqrt{15}-\sqrt{3})/\(sqrt{3}`

Đáp án: 2 

Giải thích các bước giải:

`sqrt(6+2sqrt5)-(sqrt15 - sqrt3)/sqrt3`

`= sqrt(5+1+2sqrt5)-(sqrt(3.5) - sqrt3)/sqrt3`

`= sqrt(5+2sqrt5+1)-(sqrt(3).sqrt(5) - sqrt3)/sqrt3`

`= sqrt(sqrt5^2+2sqrt5 . 1+1^2)-(sqrt(3).(sqrt(5) - 1))/sqrt3`

`= sqrt(sqrt5+1)^2-(sqrt(5) - 1)`

`= sqrt5+1-(sqrt(5) - 1)`

`= sqrt5+1-sqrt(5) + 1`

`= (sqrt5-sqrt5) +1 +1`

`= 2`