Factorise : x2 - 14x + 24.
Product ac = 24 & b = -14
∴ Split the middle term as - 12 & - 2
⇒ x2 - 14x + 24
= x2 - 12 - 2x + 24
⇒ x(x - 12) - 2 (x - 12) = (x - 12)(x - 2)
