x^4+4x^3+3x^2-4x-4
=x^4+4x^3+4x^2-(x^2+4x+4)
=x^2(x+2)^2-(x+2)^2
=(x+1)(x-1)(x+2)^2
=(√3-1)(√3-3)(√3)^2
=(6-4√3)*3=-12√3 +18