Factors of $q^{2} - 10 q + 21$ are

(q - 3)

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(q - 4)

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(q - 7)

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0

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Solution

The correct options are
A $(q - 3)$
B $(q - 7)$
$q^{2} - 10 q + 21$
$= q^{2} - 7 q - 3 q + 21$
$= q (q - 7) - 3 (q - 7)$
$= (q - 7) (q - 3)$

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