Question

factorise a-64a^3
please answer​

Answer 1

$a - 64 {a}^{3} \\ \\ = >a (1 - 64 {a}^{2} ) \\ \\ = > a( {(1)}^{2} - {(8a)}^{2} ) \\ \\ = > a(1 + 8a)(1 - 8a)$

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