Q3 of 53 Page 166

Foctorise the following:

x2 – 3x – 18

⇒ x2 - 3x - 18


⇒ x2 - 6x + 3x - 18


⇒ x(x - 6) + 3(x - 6)


⇒ (x - 6)(x + 3)


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x2 + 7x + 12

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x2 + x – 12

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x2 + 4x – 21

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Foctorise the following:

x2 – 4x – 192