Question

Far orize: (x - y)3 + (y – z)3 + (z – x)3​

Answer 1

(x-y)^3 + (y-z)^3 + (z-x)^3

=x-y*x-y*x-y + y-z*y-z*y-z + z-x*z-x*z-x

=x^3-y^3 + y^3-z^3 +z^3-x^3

=x^3-x^3 + y^3-y^3 + z^3-z^3

=0 + 0 + 0

=0

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