EXERCISE 2F
2. 100 - 9x
4. (3x + 5y)? - 42
6. 20x? - 45
8. 2-50x?
10. x - 64x
12. 3ab - 243ab?
14. 108a? - 3(b -- c)?
16. a² + 2ab + b2 - 9c?
18. a? - b2 - 4ac + 4c?
20. x² - y2 + 6y - 9
22. X-1
24. x - 625
646²
3y
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