1. C/W Expanding Brackets
27 April 2005
Aim : To be able to expand brackets of
the form (2x + 5)(4x + 2)
Simplify:
5) 7a + 3a
6) 6b b - 1
7) y2 + 3y +4y + 7
8) 5x2 + 2x + 6x + 5
=10a + 5
=9b + 1
=y2 + 7y + 7
=5x2 + 8x + 5
1) 4x + x
2) 4t + t
3) 5f f + 13
4) g + 3g + 5
=5x
=5t + 14
=12f + 19
=9g + 17

2. Expand Brackets Low C C B
This means ‘get rid’ of the brackets in cases like:
3(x + 2)
4(2x + 3)
x(x + 3)
3(x – 2) + 2(x – 3)
(x + 3)(x – 2)
Low C C B

3. (b + 4)(b + 2) b × b + 4 × 2 + b × 2 + 4 × b = b2 + 2b + 4b + 8
This can be written as:
(b + 4)(b + 2)
b × b
+ 4 × 2
+ b × 2
+ 4 × b
= b2 + 2b + 4b + 8
= b2 + 6b + 8