
ա․ D=22-4x7x(-6)=4-168=-164
բ․ D=196-4x20x1=116
x1=(-14+10.77)/20=-0.1615
x2=(-14-10.77)/20=-1.2385
գ․ D=0.16-4×0.2=-0.64
դ․ D=8.4681-4=4.4681
x1=(-2.91+2.11)/2=-0.4
x2=(-2.91-2.11)/2=-2.51
ե․ D=81-3=78
x1=(-9+9)/0.5=0
x2=(-9-9)/0.5=-36
զ․ D=100-100=0
x=-10+0/0.4=-25
է․ D=100-36=64
x1=(-10+8)/3.46=0,57
x2=(-10-8)/3.46=-5.20
ը․ D=8-24=-16

ա․ 15-20t+5t=0
3-4t+1t=0
D=16-12=4
x1=-4+2/6=3
x2=-4-(2)/6=1
t=+-1,3
բ․ 3-1=2
t=+-2

ա․ D=49+72=121
x1=-7+11/2=2
x2=-7-11/2=-9
բ․ D=36-20=16
x1=-6+4/2=-1
x2=-6-4/2=-5
գ․ D=256-60=196
x1=16+14/20=1.5
x2=16-14/20=0.1
դ․ D=16+64=80
x1=4+8.94/6=5.49
x2=4-8.94/6=2.51
ե․ D=1+88=89
x1=-1+9.43/14=0.60
x2=-1-9.43/14=0.71
զ․ D=144+23760=23906
x1=-12+154.61/4=35,6525
x2=-12-154.61/4=-41.6525
է․ D=14+39=53
x1=-7+7.28/18=0.01
x2=-7-7.28/18=0.79