﹣（3a2﹣4ab）+[a2﹣2（2a2+2ab）]． 問題詳情：﹣（3a2﹣4ab）+[a2﹣2（2a2+2ab）]．【回答】原式=﹣3a2+4ab+a2﹣4a﹣4ab=﹣6a2知識點：整式的加減題型：計算題...
![﹣（3a2﹣4ab）+[a2﹣2（2a2+2ab）]．](https://i3.guowenba.com/3133661380fed2/746d2e/313271068d/746d2e4bd3a99b-s.jpg "﹣（3a2﹣4ab）+[a2﹣2（2a2+2ab）]．")