1. x ^3 - 6x^2 + 11 x - 6
2. x^3 + 3x ^2 - 4
3. 6x^3 - 5x^2 - 2 x + 1
4. a^4 + 2a^3 + 3a^2 + 2a + 1
收錄日期: 2021-04-27 21:34:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20141031000015KK01096