Giải phương trình $x^{3}+\sqrt{3}x^{2}+x-\sqrt{3}=0$
#1
Posted 04-03-2018 - 19:41
#2
Posted 16-03-2018 - 21:18
Phải là $x^{3}+\sqrt{3}x^{2}+x+\sqrt{3}=0$ chứ nhỉ
$$\Leftrightarrow x(x^{2}+1)+\sqrt{3}(x^{2}+1)=0\Leftrightarrow (x^{2}+1)(x+\sqrt{3})=0 \Leftrightarrow x=-\sqrt{3}$$
Edited by NhatHuyVanLang, 16-03-2018 - 21:18.
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