Hướng dẫn trả lời:
`C = sqrt{3}cdot(8sqrt{3} - sqrt{191}) + sqrt{3}cdot(8sqrt3 + sqrt191)`
`= sqrt{3}cdot[(8sqrt{3} - sqrt{191}) + (8sqrt3 + sqrt191)]`
`= sqrt{3}cdot(8sqrt{3} - sqrt{191} + 8sqrt3 + sqrt191)`
`= sqrt{3}cdot[(8sqrt{3} + 8sqrt3) + (- sqrt{191} + sqrt191)]`
`= sqrt{3}cdot16sqrt3`
`= 16cdot(sqrt3)^2`
`= 16cdot3`
`= 48`
Đáp án:
`= 48`