X²-2x-24<0 x1=6 x2=-4<br>(x-6)(x+4)<0 x²≥36 x≥6 x≤-6<br>
----------- -4--------------------6---------------
+ - +
x∈(-4;6)
x²+2x-15>0 x1=-5 x2=3
x∈(-∞;-5)∪(3;∞)
x≥6 x≤-6 ------------------ -6-------- -5------ -4----------3----------6--------
- - - - + +
x∈(-∞;-6) ∪ (6;∞)