If $P (- 7) = 0$ then a factor of $P (x)$ is _________.

x - 1

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x + 1

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x + 7

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x - 7

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Solution

The correct option is C $x + 7$
For a polynomial $P (x)$ , if $P (a) = 0$

then $(x - a)$ is a factor of $P (x)$ .

Here, $P (- 7) = 0$

So, $x - (- 7)$ is a factor of $P (x)$

$∴ x + 7$ is a factor of $P (x)$ .

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