请求帮助解一元三次方程:x*3+4.07x*2+2.44=0

我使用科学计算器得到三个实根：
x1=-4.207809062

x2=x3=0.068904531

ans =

[ -4.2078090621402240273124927437742]
[ .68904531070112013656246371887124e-1-.75837087636372738459103910069494*i]
[ .68904531070112013656246371887124e-1+.75837087636372738459103910069494*i]