Question:
Factorize:
$x^{2}-x-156$
Solution:
We have:
$x^{2}-x-156$
We have to split (
Clearly, $-13+12=-1$ and $-13 \times 12=-156$
$\therefore x^{2}-x-156=x^{2}-13 x+12 x-156$
$=x(x-13)+12(x-13)$
$=(x-13)(x+12)$
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