台湾人在大陆银行开户:分解因式(y-x)(a-b+c) +(x-y)(b+a+c)
来源:百度文库 编辑:中科新闻网 时间:2024/05/16 11:19:00
分解因式(有步骤):
(y-x)(a-b+c)+(x-y)(b+a+c)
(y-x)(a-b+c)+(x-y)(b+a+c)
(y-x)(a-b+c)+(x-y)(b+a+c)
=(y-x)(a-b+c)-(y-x)(b+a+c)
=(y-x)(a-b+c-a-b-c)
=-2b(y-x)
=(y-x)(a-b+c)-(y-x)(b+a+c)
=(y-x)(a-b+c-b-a-c)
=(y-x)(-2b)
=-2by+2bx