Hешить неравенство 2х^2+5х<0

Question

Hешить неравенство 2х^2+5х<0

Answer 1

2х^2 - 5х + 3 = 0
a = 2
b = - 5
c = 3
D = b^2 - 4ac = (-5)^2 - 4*2*3 = 25 - 24 =  1 
x1 = ( 5 +1)/4 = 6/4 = 3/2 = 1,5
x2 = ( 5 - 1)/4 = 4/4=1