= (√3)^5 - 5(√3)^4 i - 10 (√3)^3 + 30i + 5(√3) - i = 9√3 - 45i - 30√3 + 30i + 5√3 - i = - 16√3 - 16i = - 16(√3 + i)
=[1/2+i√3/2]/(-2)=-(1+i√3)/4