(2x-y+1)(2x+y-1)
答案:3 悬赏:70
解决时间 2021-02-12 06:43
- 提问者网友:敏感魔鬼
- 2021-02-11 07:35
(2x-y+1)(2x+y-1)
最佳答案
- 二级知识专家网友:承载所有颓废
- 2021-02-11 08:06
(2x-y+1)(2x+y-1)
=[2x-(y-1)][2x+(y-1)]
=(2x)^2-(y-1)^2
=4x^2-y^2+2y-1
=[2x-(y-1)][2x+(y-1)]
=(2x)^2-(y-1)^2
=4x^2-y^2+2y-1
全部回答
- 1楼网友:为你轻狂半世殇
- 2021-02-11 10:16
(2x-y+1)(2x+y-1)=[2x-(y-1)][2x+(y-1)]=(2x)^2-(y-1)^2
=4x^2-y^2+4y-1
- 2楼网友:末路丶一枝花
- 2021-02-11 08:50
(2x-y+1)(2x+y-1) =[2x-(y-1)][2x+(y-1)] =4x2-(y-1)2 =4x2-y2+2y-1
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