(а-3)х2+(3-а)х-1/4=0.
10x2-11x+3=0.
2-18х+77=0.
x^2+x-6=0.
9x2-12x+4=0.
2x2+x-3=0.
x^2-26x+120=0.
3х2 + 6х – 6 = 0.
2х2 + 5х – 7 = 0.
2х2 + х + 3 = 0.
х2 – 4х + 4= 0.
−2·x2−5·x+0,2=0
3·x2+12·x−7=0
x2−3·x+1=0,5·x2+(−2)·x+(−3)=0.
а(а+3)х^2+(2а+6)х-3а-9=0