Առաջադրանքներ:
![](https://gormnacakanyan.files.wordpress.com/2021/11/image.png?w=588)
ա) y2-3y+2=0
D=9-4x1x2=1
y1=3+V1/2a=2
y2=3-V1/2a=1
x2=2, +- 2
x2=1, +- 1
բ) y2-10y+9=0
D=100-4x1x9=64
y1=10+V64/2a=9
y2=10-V64/2a=1
x2=9, +- 3
x2=1, +- 1
գ) y2-5y+4=0
D=25-4x1x4=9
y1=5+3/2a=4
y2=5-3/2a=1
x2=4, +- 2
x2=1, +- 1
դ) y2-26y+25=0
D=676-4x1x25=576
y1=26+V576/2a=25
y2=26-V576/2a=1
x2=25, +- 5
x2=1, +-1
![](https://gormnacakanyan.files.wordpress.com/2021/11/image-1.png?w=545)
ա) y2+2y-8=0
D=4-4x1x(-8)=36
y1=-2+6/2a=2
y2=-2-6/2a= -4
a2=2, +- V2
բ) a2+9a-400=0
D=81-4x1x(-400)=1681
a1=-9+41/2a=16
a2=-9-41/2a= -25
y2=16, +- 4
գ) Ø
դ) y2-21y+100=0
D=441-4x1x100=41
y1=21+41/2a=31
y2=21-41/2a=-10
m2=31, +- V31
![](https://gormnacakanyan.files.wordpress.com/2021/11/image-2.png?w=552)
ա) Ø
բ) y2-14y-15=0
D=196-4x1x(-15)=256
y1=14+16/2a=15
y2=14-15/2a=-1
x2=15, +- V15
գ) Ø
դ) Ø