r3 - 4r2 - 4r + 16 = 0
上式是怎麼轉換成下式的啊
→ ( r + 2 )( r - 2 )( r - 4 ) = 0
高階ODE怎麼分解
2014-05-18 6:32 am
回答 (13)
2014-05-18 6:58 am
✔ 最佳答案
r^3 - 4r^2 - 4r + 16 = 0
==> (r - 4)r^2 - 4(r - 4) = 0
==> (r - 4)(r^2 - 4) = 0
==> (r - 4)(r + 2)(r - 2) = 0
2014-06-05 2:06 pm
2014-06-03 2:56 pm
2014-05-29 4:00 pm
2014-05-28 3:23 pm
2014-05-27 11:58 am
2014-05-24 12:56 pm
2014-05-23 4:07 pm
2014-05-19 9:53 am
中學時學的 "因式分解" 不要丟了啊!
2014-05-18 8:59 am
>這家不錯*****買幾次啦真的一樣
侟亱哠
侟亱哠
收錄日期: 2021-05-04 01:55:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140517000010KK09510