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Factor Theorem

The factorize...

Question

The factorized form of $63 x^{2} - 448$ is

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Solution

$A] 63 x^{2} - 448$
$= 7 (9 x^{2} - 64)$
$= 7 ((3 x)^{2} - 8^{2})$
$= 7 (3 x - 8) (3 x + 8)$

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