约分4m-m²-4分之m-2

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约分4m-m²-4分之m-2约分4m-m²-4分之m-2约分4m-m²-4分之m-24m-m²-4分之m-2=(2-m)(m-2)分之m-2约分=2-m分之1

约分4m-m²-4分之m-2
约分4m-m²-4分之m-2

约分4m-m²-4分之m-2
4m-m²-4分之m-2
=(2-m)(m-2)分之m-2
约分=2-m分之1