化简(a²-2ab-b²)-(2a²-2b²)+3ab
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/30 15:20:17
化简(a²-2ab-b²)-(2a²-2b²)+3ab
(a²-2ab-b²)-(2a²-2b²)+3ab
=a²-2ab-b²-2a²+2b²+3ab
=-a^2+ab+b^2
(a²-2ab-b²)-(2a²-2b²)+3ab
=a²-2ab-b²-2a²+2b²+3ab
=-a²+ab+b²
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/30 15:20:17
化简(a²-2ab-b²)-(2a²-2b²)+3ab
(a²-2ab-b²)-(2a²-2b²)+3ab
=a²-2ab-b²-2a²+2b²+3ab
=-a^2+ab+b^2
(a²-2ab-b²)-(2a²-2b²)+3ab
=a²-2ab-b²-2a²+2b²+3ab
=-a²+ab+b²