作业帮2m-4分之3-m\(m+2- m-2分之5)
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2m-4分之3-m\(m+2- m-2分之5)
2m-4分之3-m\(m+2- m-2分之5)
2m-4分之3-m\(m+2- m-2分之5)
=(3-m)/2(m-2) ÷[(m+2)(m-2)-5]/(m-2)
=(3-m)/2(m-2)÷(m²-9)/(m-2)
=(3-m)/2(m-2)× (m-2)/(m+3)(m-3)
=-1/(m+3)