雷暴天气:初一数学

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1+x^2-y^2-z^2-2x+2yz

1+x^2-y^2-z^2-2x+2yz
=1-2x+x^2-y^2+2yz-z^2
=(1-x)^2-(y-z)^2
=(1-x+y-z)*(1-x-y+z)

1+x^2-y^2-z^2-2x+2yz
=(x-1)^2-(y+z)^2
=(x-1+y+z)(x-1-y-z)