Question

$x ^{2} - x - 156$
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Answer 1

x² - x - 156

= x² - 13x + 12x - 156

= x(x - 13) + 12(x - 13)

= (x - 13)(x + 12).

Answer 2

Answer:

$= > {x}^{2} - x - 156 \\ \\ = > {x}^{2} - (13 - 12)x - 156 \\ \\ = > {x}^{2} - 13x + 12x - 156 \\ \\ = > x(x - 13) 12(x - 13) \\ \\ = > (x - 13)(x + 12)$