x^3 + y^3 + z^3 -3xyz = 1/2(x +y+z) [(x-y)^2 + (y-z)^2 + (z -x)^2] – InterviewSolution

1.	x^3 + y^3 + z^3 -3xyz = 1/2(x +y+z) [(x-y)^2 + (y-z)^2 + (z -x)^2]
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