(2x + 3y + 4z) (4x2 +9y2 + 16z2 - 6xy - 12yz - 8zx).
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Answer:
by using formula:-
[ a³ + b³ + c³ - 3abc ]
so the answer is
8x³ + 27y³ + 64z³ - 72xyz.
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