\[9x^{3} - 27x^{2} = 0\]
\[x^{2}(9x - 27) = 0\]
\[x^{2} = 0;\ \ \ \ \ 9x = 27\]
\[x = 0\ \ \ \ \ \ \ \ \ x = 3\]
\[Ответ:\ \ x = 0;\ \ x = 3.\]