(2x-3)(x+5)(3x-1)^3<0</strong>
----------------- -5----------------1/3-----------------3/2------------------
- + - +
x∈(-∞;5)∪(1/3;3/2)
(x-2)(x+3)(x-1)^2>0
------------------- -3--------------1------------------2------------
+ - - +
x∈(-∞;-3)∪(2;∞)
-5x^2-12x+17>0
5x²+12x-17<0 D=12²+4*5*17=144+340=484 √D=22<br>x1=1/10[-12-22]=-3.4 x2=1/10[-12+22]=1
5x²+12x-17=5(x+3.4)(x-1)<0<br>
------------ -3.4-------------------- 1------------------
+ - +
x∈(-3.4;1)