问题标题:
根号48-根号27/2(3-根号3)(1+1/根号3)
问题描述:
根号48-根号27/2(3-根号3)(1+1/根号3)
陆新泉回答:
√48-√27/2(3-√3)(1+1/√3)
=4√3-3/2√3×(3-√3)(√3+1)/√3
=4√3-3/2×(3-√3)(√3+1)
=4√3-√3/2×(3-√3)(3+√3)
=4√3-√3/2×(9-3)
=4√3-3√3
=√3
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