4х-50х2+40=0|:2
-25х2+2х+20=0
D= 4-4*(-25)*20=2004
x= -2+√2004/2*(-25)= 44√68/(-50)=50√32/(-50)= -1√32=4√7=6√3
x= -2-√2004/(-50)= 50√2/(-50)= -1√2
4х-50х2+40=0|:2
-25х2+2х+20=0
D= 4-4*(-25)*20=2004
x= -2+√2004/2*(-25)= 44√68/(-50)=50√32/(-50)= -1√32=4√7=6√3
x= -2-√2004/(-50)= 50√2/(-50)= -1√2