Question

Factorize a 64 - 81c4​

Answer 1

Step-by-step explanation:

$a {}^{64} - 81c {}^{4} \\ = (a {}^{8} ) {}^{2} - (9c {}^{2} ) {}^{2} \\ = (a {}^{8} + 9c {}^{2} )(a {}^{8} - 9c {}^{2}) \\ = (a {}^{8} + 9c {}^{2})(a {}^{4} + 3c)(a {}^{4} - 3c)$

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