Eric Nicholas K's answer to Tasmia's India question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
Not so sure about this though as I am not well versed in large expression factorisation.

My solutions would be

27x3 + y3 + z3 - 9xyz
= (3x + y + z) * (9x2 + y2 + z2 - 3xy - 3xz - yz)