Question
Factorise: $x^2+x-132$
✓
Answer
$x^2+x-132$
$=x^2+12 x-11 x-132$
${-132 = 12 × (-11), 1 = 12 - 11}$
$= x(x + 12) - 11(x + 12) $
$= (x + 12)(x - 11)$
$=x^2+12 x-11 x-132$
${-132 = 12 × (-11), 1 = 12 - 11}$
$= x(x + 12) - 11(x + 12) $
$= (x + 12)(x - 11)$
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