x´2+7x+12=0
D = 49-4*1*12 = 1
корень из D = 1
x1 = (-7 + 1 )/2 = -6/2 = -3
x2 = (-7 - 1 )/2 = -8/2 = -4
x´2+7x+12=0
D = 49-4*1*12 = 1
корень из D = 1
x1 = (-7 + 1 )/2 = -6/2 = -3
x2 = (-7 - 1 )/2 = -8/2 = -4