x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)急啊

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x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)急啊x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)急啊x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)急啊x&su

x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)急啊
x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)
急啊

x立方-2x平方-4x-1等于(x+1)(x平方+mx+n)急啊
x³-2x²-4x-1
=x³+x²-(3x²+4x+1)
=x²(x+1)-(x+1)(3x+1)
=(x+1)(x²-3x-1)
所以m=-3,n=-1

n=-1
m=-3