El profesor se sorprenderá mucho al ver tu solución correcta😉
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(-4)^2 - 4 * (7) * (3) = -68
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
suma
____ ____ 2 I*\/ 17 2 I*\/ 17 - - -------- + - + -------- 7 7 7 7
=
4/7
producto
/ ____\ / ____\ |2 I*\/ 17 | |2 I*\/ 17 | |- - --------|*|- + --------| \7 7 / \7 7 /
=
3/7
3/7
____ 2 I*\/ 17 x1 = - - -------- 7 7
____ 2 I*\/ 17 x2 = - + -------- 7 7
x2 = 2/7 + sqrt(17)*i/7
x1 = 0.285714285714286 - 0.589015089373952*i
x2 = 0.285714285714286 + 0.589015089373952*i
x2 = 0.285714285714286 + 0.589015089373952*i