1) (5x-3)(x-y)-3x(y-x)
2) (a-2b)2次+(2a-b)(2b-a)
3) 2(x+y-1)2次-4(1-x-y)
4) 5m2次n+m2次(1-n)+2m2次n
問一些maths??急.................help*
2007-10-09 3:13 am
回答 (1)
2007-10-09 6:18 am
✔ 最佳答案
1) (8x-3)(x-y)2) -(a+b)(a-2b)
3) 2(x+y+1)(x+y-1)
4) m2次(5n+1-n+2n)
參考: my fran
收錄日期: 2021-04-13 13:49:42
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https://hk.answers.yahoo.com/question/index?qid=20071008000051KK03056