化简4ab-2(a^2-2ab)-a(2ab-a^2)

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化简4ab-2(a^2-2ab)-a(2ab-a^2)化简4ab-2(a^2-2ab)-a(2ab-a^2)化简4ab-2(a^2-2ab)-a(2ab-a^2)化简4ab-2(a^2-2ab)-a(

化简4ab-2(a^2-2ab)-a(2ab-a^2)
化简4ab-2(a^2-2ab)-a(2ab-a^2)

化简4ab-2(a^2-2ab)-a(2ab-a^2)
化简4ab-2(a^2-2ab)-a(2ab-a^2)
=4ab-2(a^2-2ab)+a(a^2-2ab)
=4ab+(a-2)(a^2-2ab)