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Prove that |{:(yz-x^2,zx-y^2,xz-z^2),(zx-y^2,xy-z^2,yz-x^2),(xy-z^2,yz-x^2,zx-y^2):}|=|{:(r^2,U^2,U^2),(U^2,r^2,U^2),(U^2,U^2,r^2):}| where r^2+y^2+z^2 and U^2=xy+yz+zx (Hint : Use |adjA|=|A|^2| |
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