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If omega is an imaginary cube root of u...

If `omega` is an imaginary cube root of unity, then the value of `(p+q)^3+(pomega+qomega^2)^3+(pomega^2+qomega)^3` is: (a) `3(p+q)(p+qomega)(p+qomega^2)` (b) `3(p^3+q^3)` (c)`3(p^3+q^3)-p q(p+q)` (d) `3(p^3+q^3)p q(p+q)`

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