已知x/2+y/2-z/2=3,求x^2+2xy+y^2-2xz-2yz+z^2

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已知x/2+y/2-z/2=3,求x^2+2xy+y^2-2xz-2yz+z^2已知x/2+y/2-z/2=3,求x^2+2xy+y^2-2xz-2yz+z^2已知x/2+y/2-z/2=3,求x^2

已知x/2+y/2-z/2=3,求x^2+2xy+y^2-2xz-2yz+z^2
已知x/2+y/2-z/2=3,求x^2+2xy+y^2-2xz-2yz+z^2

已知x/2+y/2-z/2=3,求x^2+2xy+y^2-2xz-2yz+z^2
X+Y-Z=6
（X+Y-Z）^2=36
所以x^2+2xy+y^2-2xz-2yz+z^2 =36