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Factorising into double brackets

Stuck? Read the notes

	Answers
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Factorise the expressions below.

1. x^{2} + 5x + 6
2. x^{2} + 8x + 15
3. x^{2} + 4x + 4
4. x^{2} + 15x + 54
5. x^{2} + 3x -28
6. x^{2} -12x + 32
7. x^{2} -2x -15
8. x^{2} -9x + 18
9. x^{2} -14x + 49