Factorise:x2 + 6x + 8

x2 + 4x + 2x + 8= x(x + 4) + 2(x + 4)= (x + 2)(x + 4)

Q2 of 53 Page 77

Factorise:
x² + 6x + 8

x² + 4x + 2x + 8

= x(x + 4) + 2(x + 4)

= (x + 2)(x + 4)

In the following, you are given the product pq and the sum p + q. Determine p and q:

pq = –6 and p + q = –5

In the following, you are given the product pq and the sum p + q. Determine p and q:

pq = –44 and p + q = –7

Factorise:

x² + 4x + 3

Factorise:

a² + 5a + 6

Questions · 53

4. Factorisation

1 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 1 2 3 3 3 3 3 3 3 4 4 4 4 4 5 5 5 5 6