El profesor se sorprenderá mucho al ver tu solución correcta😉
7 4 3 x + 8*x + 16*x + 128 = 0
x1 = -2
___ x2 = 1 - I*\/ 3
___ x3 = 1 + I*\/ 3
___ ___ x4 = - \/ 2 - I*\/ 2
___ ___ x5 = - \/ 2 + I*\/ 2
___ ___ x6 = \/ 2 - I*\/ 2
___ ___ x7 = \/ 2 + I*\/ 2
x7 = sqrt(2) + sqrt(2)*i
suma
___ ___ ___ ___ ___ ___ ___ ___ ___ ___ -2 + 1 - I*\/ 3 + 1 + I*\/ 3 + - \/ 2 - I*\/ 2 + - \/ 2 + I*\/ 2 + \/ 2 - I*\/ 2 + \/ 2 + I*\/ 2
=
0
producto
/ ___\ / ___\ / ___ ___\ / ___ ___\ / ___ ___\ / ___ ___\ -2*\1 - I*\/ 3 /*\1 + I*\/ 3 /*\- \/ 2 - I*\/ 2 /*\- \/ 2 + I*\/ 2 /*\\/ 2 - I*\/ 2 /*\\/ 2 + I*\/ 2 /
=
-128
-128
x1 = 1.4142135623731 + 1.4142135623731*i
x2 = 1.4142135623731 - 1.4142135623731*i
x3 = -1.4142135623731 - 1.4142135623731*i
x4 = 1.0 + 1.73205080756888*i
x5 = 1.0 - 1.73205080756888*i
x6 = -1.4142135623731 + 1.4142135623731*i
x7 = -2.0
x7 = -2.0