Verify that x 3 + y3 + z3 -3xyz = 1/2 (x+y+z) [(x-y) 2 + (y-z) 2 +(z-x) 2]
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Verify that : x3+y3+z3−3xyz=12(x+y+z)[(x−y)2+(y−z)2+(z−x)2)]