Factorise the following:

1. 4x + 8
2. 3x – 12
3. 9 + 6x
4. 4ab + 2a
5. 12x²y – 9xy³
6. x² + 5x + 6
7. x² + 2x – 8
8. x² – 8x + 15
9. 2x² + 6x + 4
10. – x² + x + 12

Answers:

1. 4(x + 2)
2. 3(x – 4)
3. 3(2x + 3)
4. 2a(2b + 1)
5. 3xy(4x – 3y²)
6. (x + 3)(x + 2)
7. (x + 4)(x – 2)
8. (x – 3)(x – 5)
9. (2x + 4)(x + 1)
10. (4 – x)(x + 3)