[a+(b-c)]•[a-(b-c)]
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 01:04:18
![[a+(b-c)]•[a-(b-c)]](/uploads/image/z/11453744-56-4.jpg?t=%5Ba%2B%28b-c%29%5D%26%238226%3B%5Ba-%28b-c%29%5D)
[a+(b-c)]•[a-(b-c)]
[a+(b-c)]•[a-(b-c)]
[a+(b-c)]•[a-(b-c)]
我直接把计算过程 给你列出来 自己看,不懂再问!
[a+(b-c)]*[a-(b-c)]
(a+b-c)*(a-b+c)
(a+b-c)a-(a+b-c)b+(a+b-c)c
a^2+ab-ac-ab-b^2+bc+ac+bc-c^2
a^2-b^2+2bc-c^2