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Mathematics, 02.02.2020 22:51 pedrozac81

If x+y+z=0 prove that (x^2+y^2+z^2)=4(xy+xz+yz)^2

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If x+y+z=0 prove that (x^2+y^2+z^2)=4(xy+xz+yz)^2...
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