Factorize:
$x^{2} - 28 x + 132$

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Solution

We need to factorise $x^{2} - 28 x + 132$
It can be written as $x^{2} - 28 x + 132 = x^{2} - 22 x - 6 x + 132$
$= x (x - 22) - 6 (x - 22)$
$= (x - 22) (x - 6)$

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