a little synthetic division shows that
3x^4-x^3+4x^2-2x-4 = (x-1)(x+2)(x-2)(3x+1)
that should help
Find all real and imaginary roots of the polynomial equation 3x^4-x^3+4x^2-2x-4=0
2 answers
oops my bad
(x-1)(3x+2)(x^2+2)
(x-1)(3x+2)(x^2+2)