The teacher will be very surprised to see your correct solution 😉
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(8)^2 - 4 * (-1) * (6) = 88
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
sum
____ ____ 0 + 4 - \/ 22 + 4 + \/ 22
=
8
product
/ ____\ / ____\ 1*\4 - \/ 22 /*\4 + \/ 22 /
=
-6
-6
____ x1 = 4 - \/ 22
____ x2 = 4 + \/ 22