Х ( вкадраті) - 5х + 6 =0
X^2 - 5x + 6 = 0 D = (-5)^2 - 4*1*6 = 25 - 24 =1 D = V1 = 1 x1 = 5 + 1 / 2 = 6/2 = 3 x2 = 5 - 1 / 2 = 4/2 = 2 otvet: x1 = 3; x2 = 2