9. The solution set of the inequality $|x|^{3}-2 x^{2}-4|x|+3<0$ is
9. $\left(-3,-\frac{\sqrt{5}+1}{2}\right) \cup\left(\frac{\sqrt{5}-1}{2}, 3\right)$ Verification shows that the rational root of the left side of the inequality is 3, so the left side can be factored as $(|x|-$ 3) $\left(|x|^{2}+|x|-1\right)<0$.