Which of the following is a factor of $x^{2} - 16 ?$

x - 16

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x + 16

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x + 18

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x - 4

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Solution

The correct option is B $x - 4$
$x^{2} - 16 = x^{2} - 4^{2} = (x - 4) (x + 4)$
$∴ (x - 4)$ is a factor of $x^{2} - 16$

So, option D is correct.

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