x²-6x+5=0
D=36-20=16
x1,2=6±4/2
x1=5
x2=1
г)х²-3х+4=0
D=9-8=1
x1,2=3±1/2
х1=2
х2=1
2х²-5х+3=0
D=25-24=1
x1,2=5±1/4
x1=1,5
4x²-4x+1=0
D=16-16=0 => один корень
x=4+0/8=0.5
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Answers & Comments
x²-6x+5=0
D=36-20=16
x1,2=6±4/2
x1=5
x2=1
г)х²-3х+4=0
D=9-8=1
x1,2=3±1/2
х1=2
х2=1
2х²-5х+3=0
D=25-24=1
x1,2=5±1/4
x1=1,5
x2=1
4x²-4x+1=0
D=16-16=0 => один корень
x=4+0/8=0.5