(x^2+1)x=10670

2010-04-30 1:43 am
(x^2+1)x=10670
.
.
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x=22

求步驟

回答 (2)

2010-04-30 2:09 am
✔ 最佳答案
(x^2+1)x=10670
x^3+x-10670=0
(x-22)(x^2+22x+485)=0
Since x^2+22x+485>0
x=22

2010-04-29 18:10:38 補充:
From x^2+22x+485=0,
Discriminant=22^2-4(485)(1)=-1456<0
x^2+22x+485>0


收錄日期: 2021-04-23 20:40:19
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