x^ - x = a^ - a
^為2次方
更新1:
x^ + (3m-2n)x - 6mn = 0 打少左個x 唔該俾埋步驟我
2題因式分解問題....簡單
回答 (1)
2008-09-18 4:48 am
✔ 最佳答案
x2 + (3m-2n) x- 6mn=0(x+3m)(x-2n)=0
x2 - x = a2 - a
x2-a2=x-a
(x-a)(x+a)=x-a
(x-a)(x+a)-(x-a)=0
(x-a)(x+a-1)=0
收錄日期: 2021-04-23 20:36:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080917000051KK01773