Решите уравнение 5x^2+9x=0.

\[5x² + 9x = 0\]

\[x(5x + 9) = 0\]

\[x = 0\ \ \ \ \ \ \ \ \ \ 5x + 9 = 0\]

\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 5x = - 9\]

\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = - \frac{9}{5} = - 1\frac{4}{5}\]

\[Ответ:x = 0;\ x = - 1,8.\]