- y ^ { 3 } + z ^ { 3 } - 3 x y z = \frac { 1 } { 2 } ( x + y + z ) [ – InterviewSolution

1.	- y ^ { 3 } + z ^ { 3 } - 3 x y z = \frac { 1 } { 2 } ( x + y + z ) [ ( x - y ) ^ { 2 } + ( y - 2 ) ^ { 2 } + ( z - x )
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