El profesor se sorprenderá mucho al ver tu solución correcta😉
4 3 2 4*x + 12*x - 29*x - 57*x - 216 = 0
x1 = -9/2
x2 = 3
____ 3 I*\/ 55 x3 = - - - -------- 4 4
____ 3 I*\/ 55 x4 = - - + -------- 4 4
x4 = -3/4 + sqrt(55)*i/4
suma
____ ____ 3 I*\/ 55 3 I*\/ 55 3 - 9/2 + - - - -------- + - - + -------- 4 4 4 4
=
-3
producto
/ ____\ / ____\ 3*(-9) | 3 I*\/ 55 | | 3 I*\/ 55 | ------*|- - - --------|*|- - + --------| 2 \ 4 4 / \ 4 4 /
=
-54
-54
x1 = -0.75 - 1.85404962177392*i
x2 = -4.5
x3 = 3.0
x4 = -0.75 + 1.85404962177392*i
x4 = -0.75 + 1.85404962177392*i