
化简:【2m/(m+2) - m/(m-2)】÷m/(m²-4)
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【2m/(m+2) - m/(m-2)】÷m/(m²-4)
=[2m(m-2)-m(m+2)]/(m²-4)× (m²-4)/m
=(2m²-4m-m²-2m)/m
=(m²-6m)/m
=m-6
=[2m(m-2)-m(m+2)]/(m²-4)× (m²-4)/m
=(2m²-4m-m²-2m)/m
=(m²-6m)/m
=m-6
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