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Factorising common factors

Stuck? Read the notes

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Factorise the expressions below.

1. 3x + 6
2. 4x -16
3. 6x + 3y
4. 2x -8u
5. 12xy + 9x
6. 18tu + 14t
7. 2x^{2} + 5x
8. 12y + 14y^{2} + 8y^{3}
9. 2x + 10xy
10. 6x + 3

Factorise the more difficult expressions below.

11. 24xy + 32x^{2} -28x
12. 8tu + 10tz + 2t
13. 17z^{3} + 18z^{2}
14. 4u^{5} + 9u^{9}