Đáp án:
`2 sqrt(16/3) - 3 sqrt(1/27) - 6 sqrt(4/75)`
`= sqrt(4) . sqrt(16/3) - sqrt(9) . sqrt(1/27) - sqrt(36) . sqrt(4/75)`
`= sqrt(4 . 16/3) - sqrt(9 . 1/27) - sqrt(36 . 4/75)`
`= sqrt(64/3) - sqrt(1/3) - sqrt(48/25)`
`= (8sqrt(3))/3 - (sqrt(3))/3 - (4sqrt(3))/5`
` = (7sqrt(3))/3 - (4sqrt(3))/5`
`= (35sqrt(3))/15 - (12sqrt(3))/15 = (35sqrt(3)-12sqrt(3))/15`
`= (23sqrt(3))/15`