Answer
$x=0$ or $x=3$ or $x=-3$
Work Step by Step
We solve by factoring:
$x^{3}-9x=0$
$x(x^{2}-9)=0$
$x(x-3)(x+3)=0$
$x=0$ or $x-3=0$ or $x+3=0$
$x=0$ or $x=3$ or $x=-3$
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