这两道题怎么化简
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这两道题怎么化简
这两道题怎么化简
这两道题怎么化简
[m^2/(m-2)+4/(2-m)]÷(m+2)
=[m^2/(m-2)-4/(m-2)]÷(m+2)
=(m^2-4)/(m-2)×1/(m+2)
=(m^2-4)/(m^2-4)
=1
(-n/m)÷n/(m^2-m)
=-n/m×m(m-1)/n
=-m+1