(4a的平方b-5ab的平方)-(3a的平方b-4ab的平方)
人气:116 ℃ 时间:2019-10-19 13:12:00
解答
(4a^2b-5ab^2)-(3a^2b-4ab^2)
=4a^2b-5ab^2-3a^2b+4ab^2
=4a^2b-3a^2b-5ab^2+4ab^2
=a^2b-ab^2
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