因式分解~*^~點計點計
回答 (1)
2009-01-10 3:05 am
✔ 最佳答案
X2-Y2-2X+1=X-2X+12-Y2
=(X-1)2-Y2
=[(X-1)-Y][(X-1)+Y]
=(X-Y-1)(X+Y-1)
收錄日期: 2021-04-23 20:35:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090109000051KK01194