2m-4分之3-m\(m+2- m-2分之5)
问题描述:
2m-4分之3-m\(m+2- m-2分之5)
答
=(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)