（x+2)(y+3)-(x+1)(y-2)
答案:3 悬赏:0
解决时间 2021-02-19 21:44
- 提问者网友：烟刺痛了眼
- 2021-02-19 09:21
（x+2)(y+3)-(x+1)(y-2)
最佳答案
- 二级知识专家网友：夢想黑洞
- 2021-02-19 10:45
(x+2)(y+3)-(x+1)(Y-2)
=xy+3x+2y+6-(xy-2x+y-2)
=xy+3x+2y+6-xy+2x-y+2
=5x+y+8
=xy+3x+2y+6-(xy-2x+y-2)
=xy+3x+2y+6-xy+2x-y+2
=5x+y+8
全部回答
- 1楼网友：夢想黑洞
- 2021-02-19 13:09
原式=xy+3x+2y+6-xy+2x-y+2=5x+y+8.
请点击右下角的 [采纳答案] 谢谢
- 2楼网友：厭世為王
- 2021-02-19 12:16
（x+2)(y+3)-(x+1)(y-2)
=xy+3x+2y+6-(xy-2x+y-2)
=xy+3x+2y+6-xy+2x-y+2
=xy-xy+3x+2x+2y-y+2+6
=5x+y+8
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