If omega is a complex cube root of unity...

If `omega` is a complex cube root of unity, then `(x+y)^3+(x(omega)+y(omega)^2)^3+(x(omega)^2+y(omega))^3= `

A

`A.3(x^3+y^3)`

B

`B.3(x^3-y^3)`

C

`C.4(x^3+y^3)`

D

`D.4(x^3-y^3)`

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