因式分解:
(a) a^4+4
(b)a^4+a^2b^2+b^4
Ans:(a) (a^2+2a+2)(a^2-2a+2)
(b) (a^2+ab+b^2) (a^2-ab+b^2)
WHY?
收錄日期: 2021-04-21 22:22:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110115000051KK00671