复数范围内解方程：λ³+1=0(λ+1)(λ²-λ+1)=0(λ+1)(λ²-λ+¼+¾)=0(λ+1)[(λ-½)²+¾]=0(λ+1)[λ-½+(√3/2)i][λ-½-(√3/2)i]=0λ=-1或λ=½+(√3/2)i或λ=½-(√3/2)i
