(7m²-4mn-n²)-(3m²-mn+2n²)求解
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/01 06:51:48
![(7m²-4mn-n²)-(3m²-mn+2n²)求解](/uploads/image/z/2570120-8-0.jpg?t=%287m%26%23178%3B-4mn-n%26%23178%3B%29-%283m%26%23178%3B-mn%2B2n%26%23178%3B%29%E6%B1%82%E8%A7%A3)
(7m²-4mn-n²)-(3m²-mn+2n²)求解
(7m²-4mn-n²)-(3m²-mn+2n²)求解
(7m²-4mn-n²)-(3m²-mn+2n²)求解
(7m²-4mn-n²)-(3m²-mn+2n²)
=(7m²-4mn-n²)-3m²+mn-2n²
=4m²-3mn-3n²
=4m^2-3mn-3n^2
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/01 06:51:48
(7m²-4mn-n²)-(3m²-mn+2n²)求解
(7m²-4mn-n²)-(3m²-mn+2n²)求解
(7m²-4mn-n²)-(3m²-mn+2n²)求解
(7m²-4mn-n²)-(3m²-mn+2n²)
=(7m²-4mn-n²)-3m²+mn-2n²
=4m²-3mn-3n²
=4m^2-3mn-3n^2