3.
x
x
x
x
x
x
x
x
x
x
20
4 3
6
20
10 3
2 ( 3)
10
( 3) 2
10
3)
10
( 2)(
4. x
Expand the brackets
x x
3 101 140 0
x x
(3 4)( 35) 0
x x
, 35
4
3
101 0
140
3
1 100
140
3
21 100
140
20 3
7 (3) 100
20
(3) 7
20
3) 100
20
( 7)(
2
x
x
x
x
x
x
x
x
x
x
x
Collect like terms on L.H.S
Multiply every term by
x
Arrange as 0 2 ax bx c
Factorise
5. )
5
4)( 7)(3
5)
3
3)( 4)(
3)
10
2) 3)(
1)
6
1)( 5)(
x
x
x
x
x
x
x
x
6.
1) 24
6
4)( 5)(
5) 0
14
3)( 5)(
3) 144
120
2) 4)(
9) 0
8
1)( 5)(
x
x
x
x
x
x
x
x