x^6=1x^6-1=0(x^3+1)(x^3-1)=0(x+1)(x^2-x+1)(x-1)(x^2+x+1)=0x+1=0 x^2-x+1=0 x-1=0 x^2+x+1=0x=1 x=(1+i√3)/2 x=(1-i√3)/2 x=1 x=(-1+i√3)/2 x=(-1-i√3)/2