-(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab=

death692022-10-04 11:39:542条回答

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Наташа 共回答了21个问题 | 采纳率90.5%: -(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab
=-9a^4+18a³b-3b²-4a³b
=-9a^4+14a³b-3b²; 1年前

心情流浪共回答了912个问题 | 采纳率: -(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab
=-9a^4+18a^3b-3b^2-4a^3b
=-9a^4+14a^3b-3b^2; 1年前

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