ОДЗ:
+ - +
////////////////////////-3_________________3/////////////////////////////////////
x∈ (-∞; -3]∪[3; +∞)
- +
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\0__________________________
x∈(-∞; 0)
Общее решение: иначе x∈(-∞; -3]
ответ: x∈(-∞; -3]