化简m的平方-4分之2m-m-2分之m
人气：209 ℃ 时间：2019-12-21 22:10:00
解答
原式=2m/(m+2)(m-2)-(m+2)/(m+2)(m-2)
=(2m-m-2)/(m+2)(m-2)
=(m-2)/(m+2)(m-2)
=1/(m+2)
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