Factorise:
1. 9x?- 16y?
125
2.
3. 81 - 16x?
5. 2x-32
7. 3r-48x
9. x-647
11. 150 - 6x2
13. 20x? - 45
15. a? - 62 - a -6
17. a -62 +2bc-?
19. a? + 2ab + b2-9c2
21. (a+b)'-a-b
23. x² + 2xy + y2 - a² + 2ab – b?
25. a-b-a? + b2
27. 9-a² + 2ab-b2
29. 1 + 2ab - (a? +63)
31. x² - y2 + 6y-9
33. 9a+3a-86-6462
4. 5-20x2
6. 3ab - 243ab2
8. 27a? - 4862
10. 8ab2 - 1897
12. 2-50r?
14. (3a +56) 2-4c?
16. 4a2-962-2a-36
18. 4a2-4b2 + 4a +1
20. 108a2 - 3(b-c)?
22. x² + y2 - z2 - 2xy
24. 25x? - 10x +1-36y?
26. a? - 62 - 4ac + 4c?
28. x? - 5x? - x +5
30. 9a? +62 +1 -3662
32. 4r? -9y? - 2x-3y
1
4. x²+
3
4
36. x +
4
X
357-21
37. x-1
39. 81x*-y4
38. 16r-1
40. x4-625
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