El profesor se sorprenderá mucho al ver tu solución correcta😉
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(7)^2 - 4 * (1) * (13) = -3
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
suma
___ ___ 7 I*\/ 3 7 I*\/ 3 - - - ------- + - - + ------- 2 2 2 2
=
-7
producto
/ ___\ / ___\ | 7 I*\/ 3 | | 7 I*\/ 3 | |- - - -------|*|- - + -------| \ 2 2 / \ 2 2 /
=
13
13
___ 7 I*\/ 3 x1 = - - - ------- 2 2
___ 7 I*\/ 3 x2 = - - + ------- 2 2
x2 = -7/2 + sqrt(3)*i/2
x1 = -3.5 - 0.866025403784439*i
x2 = -3.5 + 0.866025403784439*i
x2 = -3.5 + 0.866025403784439*i