how do you factor x^3+x-2?
thank you very much
Math question: factoring
2009-12-02 2:30 pm
回答 (2)
2009-12-02 10:20 pm
✔ 最佳答案
x^3+x-2 -----------(-2)拆成-1-1 =x^3-1 +x-1
=(x-1)(x^2+x+1)+(x-1)
=(x-1)(x^2+x+1+1)
=(x-1)(x^2+x+2)
2009-12-02 3:27 pm
Using Factor Theorem, put x = 1, the expression = (1)^3 + (1) - 2 = 0, that means (x - 1) is a factor. So the expression becomes
(x - 1)(x^2 + 2 + x).
(x - 1)(x^2 + 2 + x).
收錄日期: 2021-04-25 22:37:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091202000051KK02150