要用長除/短除，因式分解:
1. x^3 - 7x^2 - 7x - 8
2. x^4 + x^2 + 1
3. 2x^3 + 5x^2 - x - 6
因式分解....(急)
2006-10-16 2:21 am
回答 (1)
2006-10-16 2:32 am
✔ 最佳答案
x^3 - 7x^2 - 7x - 8 = (x - 8)(x^2 + x + 1)x^4 + x^2 + 1 = (x^2 + x + 1)(x^2 - x + 1)
2x^3 + 5x^2 - x - 6 = (x - 1)(2x + 3)(x + 2)
收錄日期: 2021-04-25 21:15:01
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https://hk.answers.yahoo.com/question/index?qid=20061015000051KK04612