x | -2 -1 3
2x-6|-----------------------------------------0+++++++++++++++++++
3x+3|--------------------------0++++++++++++++++++++++++++
5x+10|--------------------0++++++++++++++++++++++++++++++
(2x-6)(3x+3)(5x+10)|---------------------0++0---------------0++++++++++++++++++
[tex](2x-6)(3x+3)(5x+10)<0=>x\in(-\infty;-2)\cup(-1;3)[/tex]
