1. x^2-6x+5
2. 4x^2-4x-3
用併項既方法
麻煩列埋式
thxxx
因式分解(併項)
2009-09-25 4:08 am
回答 (1)
2009-09-25 4:12 am
✔ 最佳答案
1) x^2 - 6x + 5= x^2 - 6x + 9 - 4
= (x - 3)^2 - 2^2
= (x - 3 + 2)(x - 3 - 2)
= (x - 1)(x - 5)
2. 4x^2-4x-3
= 4x^2 - 4x + 1 - 4
= (2x - 1)^2 - 2^2
= (2x - 1 - 2)(2x - 1 + 2)
= (2x - 3)(2x + 1)
收錄日期: 2021-04-21 22:04:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090924000051KK01436