El profesor se sorprenderá mucho al ver tu solución correcta😉
/ 2 \ / 3 \ -1 + 2*(x + 4)*\x + 8*x - 15/*\x + 8/ = 0
x1 = -9.56777365526624
x2 = -3.99971191043209
x3 = -2.0007715168484
x4 = 1.56844430605346
x5 = 0.999906388246635 - 1.73244305233899*I
x6 = 0.999906388246635 + 1.73244305233899*I
x6 = 0.999906388246635 + 1.73244305233899*i
suma
-9.56777365526624 - 3.99971191043209 - 2.0007715168484 + 1.56844430605346 + 0.999906388246635 - 1.73244305233899*I + 0.999906388246635 + 1.73244305233899*I
=
-12.0000000000000
producto
-9.56777365526624*-3.99971191043209*-2.0007715168484*1.56844430605346*(0.999906388246635 - 1.73244305233899*I)*(0.999906388246635 + 1.73244305233899*I)
=
-480.500000000000
-480.500000000000
x1 = -9.56777365526624
x2 = -2.0007715168484
x3 = 1.56844430605346
x4 = 0.999906388246635 - 1.73244305233899*i
x5 = 0.999906388246635 + 1.73244305233899*i
x6 = -3.99971191043209
x6 = -3.99971191043209