Question

27a⁴-588 factorise this please​

Answer 1

3(9a^4 - 196)
3[ (3a^2)^2 - 14^2 ]
3[ (3a^2 -14) (3a^2 + 14) ].
Using a^2 - b^2 = (a+b) (a-b)

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