x^3+y^3+z^3-3xyz(分解因式)

3 3 3 X + Y +Z -3XYZ(分解因式)X的3次+Y的3次+Z的3次-3XYZ
2024-11-18 06:49:53
推荐回答(3个)
回答1:

x^3+y^3+z^3-3xyz=(x+y+z)(x^2+y^2+z^2-xy-yz-zx)
由x^3+y^3+z^3=(x+y+z)(x^2+y^2+z^2)-z(x^2+y^2)-x(y^2+z^2)-y(x^2+z^2)
x^3+y^3+z^3-3xyz=……=(x+y+z)(x^2+y^2+z^2-xy-yz-zx)

回答2:

X^3+Y^3+Z^3-3XYZ
=(x+y+z)(x^2+y^2+z^2-xy-yz-xz)
因为对称,其中一个因子必然是x+y+z,,直接用多项式除法除得结果

回答3:

x^3+y^3+z^3-3xyz
=(x+y+z)(x^2+y^2+z^2-xy-yz-zx)