1) a=2; b=-9; c=10; D=1; x1=2; x2=5/2
2) a=1; b=10; c=-24; D=14; x1=-2; x2=12
3) a=2; b=-3; c=-5; D=7; x1=-1; x2=5/2
1) a=2; b=-9; c=10; D=1; x1=2; x2=5/2
2) a=1; b=10; c=-24; D=14; x1=-2; x2=12
3) a=2; b=-3; c=-5; D=7; x1=-1; x2=5/2