Ответ: \[x^{2} + 6x \leq 0\] \[x(x + 6) = 0\] \[x = 0,\ \ \ x = - 6\] \[Ответ:\ x = - 6;\ - 5;\ - 4;\ - 3;\ \] \[- 2;\ - 1;0.\]