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m分之m+3-6分之m平方-9÷2分之m-3=
人气：481 ℃　时间：2020-03-26 02:57:55
解答
=(m+3)/m-(m+3)(m-3)/6×2/(m-3)
=(m+3)/m-(m+3)/3
=[3(m+3)-m(m+3)]/(3m)
=(9-m²)/(3m)
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