А.
(x-3)(x-1)>0
x-3=0 x-1=0
x1=3 x2=1
+ - +
/////////////// /////////////////////
-------------(1)------------------------------(3)------------------
Ответ:(-∞;1)U(3;+∞)
б.
(x+2)(x-6)≤0
x+2=0 x-6=0
x1=-2 x2=6
+ - +
/////////////////////////
-------------------[-2]--------------------[6]-----------------------------
Ответ:[-2;6]