初二数学测试题大全

初二数学测试题大全

一、判断题。

1. ( )

2.＝x2-y2 ( )

3. ( )

4. ( )

5. 3a3x-4b3y+3b3x-4a3y＝(a3+b3)(3x-4y) ( )

6. (x-y)4+x(y-x)2+y(y-x)3＝2(x-y)2(x-y+1) ( )

7. 整式和分式统称有理式. ( )

8. x2-16y2-8y-1＝(x+4y+1)(x-4y+1) ( )

9. ( )

10. 把一个多项式化成几个整式的积的形式叫做多项式的因式分解. ( )

11. ( )

12. a2+2ab+b2＝(a+b)2 ( )

13. -4x3+8x2-4x＝-4x(x-1)2 ( )

14. ( )

15. ( )

16.甲用x小时走完s千米, 乙比甲早出发a小时, 早到b小时,那么乙每小时走千米. ( )

17. ( )

18. 25y2-4a2-12ab-9b2＝(5y+2a+3b)(5y-2a+3b) ( )

19. 用A、B表示两个整式, 如果B中含有字母, 式子就叫做分式. ( )

20. ( )

21. 2a6-32a2b4＝2a2(a2+4b2)(a+2b)(a-2b) ( )

22. ( )

23. ( )

24. -x3y3-x2y2+xy＝-xy(x2y2+xy-1) ( )

25. -8a3+27b3＝-(2a-3b)(4a2+6ab+9b2) ( )

26. 361-(3a+2b)2＝(19-3a-2b)(19+3a+2b) ( )

27. ( )

28. a2+b2-9c2-1-2ab-6c＝(a-b-3c-1)(a-b+3c+1) ( )

29. (x+2)(x-3)(x2-7)+(2+x)(3-x)(x+3)＝(x+2)(x-3)(x2+x-4) ( )

30. 10ab-3+6b-5a＝(5a+3)(2b-1) ( )

31. 873-763是11的倍数 ( )

32. (m-n)2-2(m2-n2)+(m+n)2＝2n2 ( )

33. 2-2a4＝2(1+a2)(1+a)(1-a) ( )

34. ( )

35. m2-n2-m+n＝(m-n)(m+n-1) ( )

36. ( )

37. x3-2x2y+xy2＝x(x-y)2 ( )

38. 当x＝-3时, ( )

39. ( )

40. x2-2xy+y2-1＝(x-y+1)(x-y-1) ( )

41. 将a2-b2+2b-1分解因式得(a+b-1)(a-b+1) ( )

42. 12x5-24x3+18x2＝6x2(2x3-4x+3) ( )

43. ( )

44. ( )

45. ( )

46. 25x2y4z16-1＝(5xy2z4-1)(5xy2z4+1) ( )

47. x2(x+1)-y(xy+x)＝x(x-y)(x+y+1) ( )

48. -a m-1+14a m-49a m+1＝-a m-1(1-7a)2 ( )

49. ab(x2+1)+x(a2+b2)＝(a+bx)(b+ax) ( )

50. a4-3a3+3a2-a＝a(a-1)3 ( )

51. 1-x6＝(1-x3)(1+x3)＝(1-x)(1+x)(1-x+x2)(1+x+x2) ( )

52. a9-ab2＝a(a4+b)(a4-b) ( )

53. x3m+3-64y3＝(x m+1-4y)(x2m+2+4x m+1y+16y2) ( )

54. a m-1-a m+2+a m-a m+1＝a m-1(1+a)2(1-a) ( )

55. a2(a+1)-b2(b+1)＝(a-b)(a2+ab+b2+a+b) ( )

56. ( )

57. (x+1)2+x(3x+2)＝(2x+1)2 ( )

58. 5x2m+3y4n+2-10x3m+7y2n+1＝5x2m+3y2n+1·(y2n+1+2x m+4) ( )

59. a2n+a n+1-a n＝a n(a n+a-1) ( )

60. ( )

61. 8m3(m2-n2)-27n6(n2-m2)＝(m2-n2)(2m+3n2)(4m2-6mn2+9n4) ( )

62. 8a3(x3-y6)+(y6-x3)＝(x-y2)(x2+xy2+y4)(2a-1)(4a2+2a+1) ( )

63. a8-81b8＝(a4-9b4)(a4+9b4) ( )

64. a16-b16＝(a-b)(a+b)(a2+b2)(a4+b4)(a8+b8) ( )

65. a4-4a3+4a2-9＝(a2-2a-3)(a2-2a+3) ( )

66. ( )

67. a2-b2+m2-n2+2(am-bn)＝(a+m+b +n )(a+m-b -n ) ( )

68. ab(c2-d2)-cd(a2-b2)＝(ac+bd)(bc-ad) ( )

69. 1+12x2y2+48x4y4+64x6y6＝(1+4x2y2)3 ( )

70. x5+x4y+2x3y2+2x2y3+xy4+y5＝(x+y)(x2+y2)2 ( )

71. -a m+1y2n-1+a m-1y2n+1＝a m-1y2n-1(-a2+y2) ( )

72. 2(a2-3mn)+a(4m-3n)＝(a+2m)(2a-3n) ( )

73. ( )

74. (a+b+c)3-(a3+b3+c3)＝3(a+b)(b+c)(a+c) ( )

75. a3m-a3m+3＝a3m(1-a)(1+a+a2) ( )

76. 343m6-125n12＝(7m2-5n4)(49m4+35m2n4+25n8) ( )

77. 1+x+x(x+1)+x(x+1)2+x(x+1)3＝(1+x)4 ( )

78. a m+4-8a m+3-16a m+2＝a m+2(a2-8a-16) ( )

79. x3-x2-x-y3+y2+y＝(x-y)(x2+xy+y2-x-y-1) ( )

80. (x+y)3+2xy(1-x-y)-1＝(x+y-1)(x2+y2+x+y+1) ( )

81. -12a2m+1b m+2+20a m+1b2m+4＝-4a m+1b m+2(3a m-5b m+2) ( )

82. a m+3-a m b3＝a m(a-b)(a2+ab+b2) ( )

83. (a-b)n+3-(a-b)n＝(a-b)n(a-b-1)(a2+b2-2ab+a-b+1) ( )

二、单选题。

84. 的结果是 [ ] A.a+5 B. C.a2-1 D.a2-a+1

85. 4xy+2y-8x-y2的结果是 [ ] A.(4y+x)(y-2) B.(4x-y)(y -2) C.(4x+y)(y+2) D.(4x+y)(y -2)

86. 当x＝____时, 分式没有意义. [ ] A.x＝3 B.x＝-3 C.x＝±3 D.x＝4

87. 等于 [ ] A. B. C. D.

88. [ ] A.- B. C. D.-

89.4a2-b2+c2-4ac等于[ ]

A.(2a-c+b)(2a+c-b)

B.(2a-c+b)(2a-c-b)

C.(2a+c+b)(2a-c-b)

D.(2a+c-b)(2a-c-b)

90. 若代数式有意义, 则x的取值范围是 [ ]

A.x≠1,x≠- 2

B.x≠1,x≠2

C.x≠1,x≠-2, x≠2

D.x≠1,x≠-2, x≠2,x≠-1

91. a2-2ab+b2-c2等于[ ] A.(a-b+c)(a-b-c) B.(a+b+c)(a-b-c) C.(a-b+c)(a+b-c) D.(a-b+c)(a+b+c)

92. 已知的值是 [ ] A.- B. C.- D.

93. 54-2y3等于 [ ] A.2(3-y)(9+3y+y2) B.(3-y)(9+3y+y2) C.(27-y3) D.2(27-y3)

94. a2(x-2a)2-a(2a-x)2 因式分解的结果是 [ ]

A.a(x-2a)2(a-1)

B.(x-2a)2(a2-a)

C.a(x-2a)2(a+1)

D.(x-2a)2(a2+a)

95. 使分式有意义的条件是 [ ] A.x≠2 B.x≠-2 C.x≠2且x≠-2 D.x≠0

96. 已知的值为 [ ] A.-1 B.1 C.1 D.

97. 计算的结果是 [ ] A. -1 B. 0 C. 1 D. 2

98. x3-xyz+x2y-x2z等于 [ ] A.(x-y)(x2-xz) B.(x+y)(x2-xz) C.x(x+y)(x+z) D.x(x+y)(x-z)