Решить уравнение: x^3-9x=0.

\[x^{3} - 9x = 0\]

\[x\left( x^{2} - 9 \right) = 0\]

\[x(x - 3)(x + 3) = 0\]

\[1)\ x = 0.\]

\[2)\ x - 3 = 0\]

\[x = 3.\]

\[3)\ x + 3 = 0\]

\[x = - 3.\]

\[Ответ:x = 0;x = \pm 3.\]