化简m的平方-4分之2m-m-2分之1
问题描述：
化简m的平方-4分之2m-m-2分之1
答
2m/(m²-4)-1/(m-2)
=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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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)