Factorize :
$a^{3} + 0.064$

(a + 0.4) (a^{2} - 0.4 a + 0.16)

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(a + 4) (a^{2} - 0.4 a + 0.12)

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(a - 4) (a^{2} - 0. a + 0.16)

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(a - 0.4) (a^{2} - 0.4 a + 0.13)

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Solution

The correct option is A $(a + 0.4) (a^{2} - 0.4 a + 0.16)$
$a^{3} + 0.064$
Using,
$a^{3} + b^{3} = (a + b) (a^{2} - a b + b^{2})$
$= (a^{3} + (0.4)^{3})$
$= (a + 0.4) (a^{2} - 0.4 a + 0.16)$

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