分解因式x^3+x^2y-xy^2-xz^2+yz^2-y^3快

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分解因式x^3+x^2y-xy^2-xz^2+yz^2-y^3快
分解因式x^3+x^2y-xy^2-xz^2+yz^2-y^3

分解因式x^3+x^2y-xy^2-xz^2+yz^2-y^3快
=(x^3-y^3)+(x^2y-xy^2)+(-xz^2+yz^2)
=(x-y)(x^2+xy+y^2)+xy(x-y)-z^2(x-y)
=(x-y)(x^2+xy+y^2+xy-z^2)
=(x-y)(x^2+2xy+y^2-z^2)
=(x-y)[(x+y)^2-z^2]
=(x-y)(x+y+z)(x+y-z)

x^3+x^2y-xy^2-xz^2+yz^2-y^3
=(x-y)(x^2+y^2+xy)+xy(x-y)-z^2(x-y)
=(x-y)(x^2+y^2+xy+xy-z^2)
=(x-y)<(x+y)^2-z^2>
=(x-y)(x+y-z)(x+y+z)

过程(X^3-Y^3)+XY(X-Y)-Z^2(X-Y)
答案 (X-Y)(X^2+Y^2+2XY-Z^2)=(X-Y)(X+Y+Z)(X+Y-Z)

(x-y)(x+y+z)(x+y-z)