Question

factorise: a^4(a^2-3b^2)^2

Answer 1

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Answer 2

a^4(a^2-3b^2)^2
a^4(a^4 plus 9b^4 - 6a^2b^2)
a^8 plus 9a^4b^4 - 6a^6b^2
(a^4 - 3a^2b^2)^2