Factorize: (i) x^3 + 216y^3 + 8z^3 ? 36xyz

(ii) a^3 ? 64b^3 ? 27c^3 ? 36abc

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(i)   ( x + 6y + 2z ) ( x^2 + 36y^2 + 4z^2 - 6xy - 12yz - 2zx )
(ii)  ( a + 4b + 3c ) ( a^2 + 16b^2 + 9c^2 - 4ab - 12bc - 3ca )
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