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这道题怎么解：x²y-y²z+z²x-x²z+y²x+z²y-2xyz
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这道题怎么解：x²y-y²z+z²x-x²z+y²x+z²y-2xyz
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x2y-y2z+z2x-x2z+y2x+z2y-2xyz解原式=x²y-y²z+z²x-x²z+y²x+z²y-2xyz =x²y+y²x-xyz-y²z+yz²-xyz+z²x-x²z =xy(x+y-z)-yz(x+y-z)+xz...
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