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[" 12Withoutexpanding,prove that "],[qqu...

[" 12Withoutexpanding,prove that "],[qquad Delta=|[x+y,y+z,z+x],[z,x,y],[1,1,1]|=0]

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Without expanding,prove that quad Delta=det[[x+y,y+z,z+xz,x,y1,1,1]]=0

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