............................................
2х²+3х+1>0
D=9-4*2*1=1
x1=-3+1/4=-0.5
x2=-3-1/4=-1
x∈(-∞;-1)∪ (-0.5;+∞)
............................................
2х²+3х+1>0
D=9-4*2*1=1
x1=-3+1/4=-0.5
x2=-3-1/4=-1
x∈(-∞;-1)∪ (-0.5;+∞)