Объяснение:
D=(-8)^2-4*12*1=64-48=16
X1=(8+4)/2=6
X2=(8-4)/2=2
x {}^{2} - 8x + 12 = 0
{{2} - 2x -6 + 12 = 0
\times (x - 2) - 6(x - 2) = 0
(x - 2) \times (x - 6) = 0
x - 2 = 0
x - 6 = 0
x = 2
x = 6
x_{1} = 2,x_{2} = 6
