Factorise 5. d2 + 9d + 14 6. x2 +8x -9
7. x2 - 16 8. y2 20y + 100
9. p2 - 2p -3 10. q2 - 11q + 24
11. b2 - 4b + 4 12. a2 + 8a + 16
THE TWOS NEXT TOTHE LETTERS ARE SQUARED
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no 76678
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