2 câu trả lời
`#tnvt`
`\sqrt{24-12\sqrt{3}}`
`=\sqrt{18-2.3\sqrt{2}.\sqrt{6}+6}`
`=\sqrt{(3\sqrt{2}-\sqrt{6})^2}`
`=|3\sqrt{2}-\sqrt{6}|`
`=3\sqrt{2]-\sqrt{6]`
`\sqrt{24-12\sqrt{3}}`
`=\sqrt{18-2.3\sqrt{2}.\sqrt{6}+6}`
`=\sqrt{(3\sqrt{2}-\sqrt{6})^2}`
`=|3\sqrt{2}-\sqrt{6}|`
`=3\sqrt{2}-\sqrt{6}`
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