Exercises 1.9, page 38

  1. 1. 3y3

  2. 3. 3x − 2

  3. 5.  − 4x2y

  4. 7. 4t4r2

  5. 9. 3x2z

  6. 11. a

  7. 13. a2 + 2y

  8. 15. t − 2rt2

  9. 17. q + 2p − 4q3

  10. 19. 2LR − R

  11. 21.  − 12b + 1a − 3a2b2

  12. 23. 3yn − 2ay

  13. 25. x + 5

  14. 27. 2x + 1

  15. 29. x − 1

  16. 31. 4x2 − x − 1 ,  R =  − 3

  17. 33. Z − 2 − 14Z + 3

  18. 35. x2 + x − 6

  19. 37. 2a2 + 8

  20. 39. y2 − 3y + 9

  21. 41. x − y

  22. 43. t − 2

  23. 45.  − 5

  24. 47. x4 + 1x + 1 = x3 − x2 + x − 1 + 2x + 1

  25. 49. V1T2T1

  26. 51. A + μ2E22A − μ4E48A3

  27. 53. GMmR

  28. 55. s2 + 2s + 6 + 16s + 16s2 − 2s − 2

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