\[x^{3} - 169x\]
\[x\left( x^{2} - 169 \right) = 0\]
\[x(x - 13)(x + 13) = 0\]
\[x = 0;\ \ x = 13;\ \ x = - 13.\]
\[Ответ:при\ x = 0;\ \ x = \pm 13.\]