2x^2+5x-3>0
2x^2+5x-3=0
D=5^2-4*2*(-3)=25+24=49
x1=-5+√49=-5+7=2\4=1\2
2*2 4
x2=-5-√49=-5-7=-12\4=-3
2*2 4
2(x-1\2)(x+3)=(2x-1)(x+3)
(2x-1)(x+3)>0
+ - +
///////////////// /////////////////////////
---------------(-3)-------------------------(1\2)----------------------
Ответ:(-∞;-3)U(1\2;+∞)