no. of triplets..

\hspace{-16}$ The number of triples of integers $\bf{(x, y, z)}$ satisfying\\\\ $\bf{x^2 + y^2 + z^2-yz-zx-xy = x^3 + y^3 + z^3}$ is...

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7
Sigma ·

(x-y)2 +(y-z)2 +( x-z)2 =2(x3+y3+z3)

LHS >= 0. then ?

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