Factorisation of the expression $64 x^{2} - 25$ results in :

(4 x - 5) (4 x + 5)

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(6 x - 5) (6 x + 5)

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(8 x - 5) (8 x + 5)

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(5 x - 8) (5 x + 8)

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Solution

The correct option is C $(8 x - 5) (8 x + 5)$
$64 x^{2} - 25 = {(8 x)}^{2} - {(5)}^{2}$
$= (8 x - 5) (8 x + 5)$ ... $[∵ a^{2} - b^{2} = (a - b) (a + b)]$

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