\[6x^{3} - 24x = 0\]
\[6x \cdot \left( x^{2} - 4 \right) = 0\]
\[6x \cdot (x - 2)(x + 2) = 0\]
\[x = 0,\ \ x = 2,\ \ x = - 2\]
\[Ответ:x = 0;\ \ x = \pm 2.\]