ab-{4a的平方b-[3a的平方b-(2ab-a的平方b)+3ab]}
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1 ab-{4a^2b-[3a^2b-(2ab-a^2b)+3ab]}
=ab-[4a^2b-(3a^2b-2ab+a^2b+3ab)]
=ab-(4a^2b-3a^2b+2ab-a^2b-3ab)
=ab-4a^2b+3a^2b-2ab+a^2b+3ab
=(ab-2ab+3ab)+(-4a^2b+3a^2b+a^2b)
=2ab
2 ab-{4a^2b-[3a^2b-(2ab-a^2b)+3ab]}
=ab-[4a^2b-(4a^2b+ab)]
=ab+ab
=2ab
=ab-[4a^2b-(3a^2b-2ab+a^2b+3ab)]
=ab-(4a^2b-3a^2b+2ab-a^2b-3ab)
=ab-4a^2b+3a^2b-2ab+a^2b+3ab
=(ab-2ab+3ab)+(-4a^2b+3a^2b+a^2b)
=2ab
2 ab-{4a^2b-[3a^2b-(2ab-a^2b)+3ab]}
=ab-[4a^2b-(4a^2b+ab)]
=ab+ab
=2ab
GamryRaman
2023-06-12 广告
2023-06-12 广告
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