2)
(x²+2x)/(x+3)≤0 ОДЗ: x+3≠0 x≠-3
(x*(x+2)/(x+3)≤0
-∞______-______-3______+______-2______-______0______+______+∞
x∈(-∞;-3)U[-2;0].
3)
(x²-6)/(x+2)>0 ОДЗ: x+2≠0 x≠-2
(x+√6)(x-√6)/(x+2)>0
-∞_____-_____-√6_____+_____-2_____-_____√6_____+______+∞
x∈(-√6;-2)U(√6;+∞).