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) ( )
