Question
Factorise:
$x^2-5 x-24$
$x^2-5 x-24$
✓
Answer
$x^2-5 x-24$
$=x^2-8 x+3 x-24$
${-24 = -8 × 3, -5 = -8 + 3}$
$= x(x - 8) + 3(x - 8)$
$= (x - 8)(x + 3)$
$=x^2-8 x+3 x-24$
${-24 = -8 × 3, -5 = -8 + 3}$
$= x(x - 8) + 3(x - 8)$
$= (x - 8)(x + 3)$
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