Question

Factorise:
$729 a^{6} - {b}^{6}$

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Answer 1

Answer:

729a^6-b^6

=(27a^3+b^3)(27a^3-b^3)

(3a+b)(9a²+b²-3ab)(3a-b)(9a²+b²+3ab)

or

(9a²-b²)(9a²+b²+3ab)(9a²+b²-3ab)