Q3 of 53 Page 166

Foctorise the following:

x2 + 7x + 12

⇒ x2 + 7x + 12


⇒ x2 + 4x + 3x + 12


⇒ x(x + 4) + 3(x + 4)


⇒ (x + 4)(x + 3)


More from this chapter

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1

The difference (0.7)2 – (0.3)2 simplifies to

 2

Factorise the following:

(i) x2 + 6x + 9


(ii) 1 – 8x + 16x2


(iii) 4x2 – 81y2


(iv) 4a2 + 4ab + b2


(v) a2b2 + c2d2 – a2c2 – b2d2.

 3

Foctorise the following:

x2 + x – 12

 3

Foctorise the following:

x2 – 3x – 18