0 46715 46723 46729 46733 46739 46741 46745 46751 46753 46759 46765 46769 46771 46775 46781 46783 46789 46793 46795 46799 46801 46805 46807 46809 46810 46811 46813 46814 46815 46817 46819 46823 46825 46829 46831 46835 46841 46843 46849 46853 46855 46859 46865 46871 46873 46879 46883 46885 46891 46895 46901 46909 447348
·························································· 4分
·························································································································· 6分
，
时，
···································································································· 8分
57. 
58. 
59. 
60. 
或
61. 
62. 
63. 
64. (a+2)(a-2) 65. 
66. 
67. 
; 52. 
53. 
54. (x+2)(x－2) 55. 
32. 
34. 35. 
36. (x+1)(x－1) 37. 
38.3
39. (x+3)(x－1) 40. 
41. 
42. a
43. 
；44. －3x2
28. 
29. 
21. (x+2)(x-2) 22. 
23. x(x+2)(x-2) 24. 