(2x+1)(x-3)(2-x)(x-5)<0
-(2x-1)(x-3)(x-2)(x-5)<0
(2x-1)(x-2)(x-3)(x-5)>0
+ + + - +
oooo>x
-1/2 2 3 5
x∈(-∞; -1/2)∪(-1/2; 2)∪(2;3)∪(5;+∞)
(2x+1)(x-3)(2-x)(x-5)<0
-(2x-1)(x-3)(x-2)(x-5)<0
(2x-1)(x-2)(x-3)(x-5)>0
+ + + - +
oooo>x
-1/2 2 3 5
x∈(-∞; -1/2)∪(-1/2; 2)∪(2;3)∪(5;+∞)