求50道初二下册数学因式分解化简求值题!!
各位帮帮啦~ 急啊!!!
还要求值啊!!
因式分解:
1.x²带如 -25=
2. x²-20x+100=
3. x²+4x+3=
4. 4x²-12x+5=
5. 3ax²-6ax=
6.x(x+2)-x=
7.x²-4x-ax+4a=
8.25x²-49=
9.36x²-60x+25=
10.4x²+12x+9=
11.x²-9x+18=
12.2x²-5x-3=
13.12x²-50x+8=
14. (x+2)(x-3)+(x+2)(x+4)=
15. 2ax²-3x+2ax-3=
16. 9x²-66x+121=
17. 8-2x²=
18. x²-x+14 =
19. 9x²-30x+25=
20.-20x²+9x+20=
21. 12x²-29x+15=
22. 36x²+39x+9=
23. 21x²-31x-22=
24. 9x4-35x²-4=
25. (2x+1)(x+1)+(2x+1)(x-3)=
26. 2ax²-3x+2ax-3=
27. x(y+2)-x-y-1=
28. (x²-3x)+(x-3)2=
29. 9x²-66x+121=
30. 8-2x²=
31. x4-1=
32. x²+4x-xy-2y+4=
33. 4x²-12x+5=
34. 21x²-31x-22=
35. 4x²+4xy+y2-4x-2y-3=
36. 9x5-35x3-4x=伏伏
37.3x²-6x=
38.49x²-25=
39.6x²-13x+5=
40.x²+2-3x=
41.12x²-23x-24=
42.(x+6)(x-6)-(x-6)=
43.3(x+2)(x-5)-(x+2)(x-3)=
44.9x²+42x+49=
45.(x+2)-2(x+2)2=
46.36x²+39x+9=
47.2x²+ax-6x-3a=
48.22x²-31x-21=
49.3ax²-6ax=
50.(x+1)x-5x=
51.(2x+1)(x-3)-(2x+1)(x-5)=
52.xy+2x-5y-10=
53. x2y2-x²-y²-6xy+蠢厅启4=
54.8x2-18
55. x2-(a-b)x-ab
56.9x4+35x2-4
57.x2-y2-2yz-z2
58.a(b2-c2)-c(a2-b2)
59. (2x+1)(x+1)+(2x+1)(x-3)
60. 39x2-38x+8
61 7(x-1)2+4(x-1)(y+2)-20(y+2)2
62. xy2-2xy-3x-y2-2y-1
63. 4x2-6ax+18a2
64. 20a3bc-9a2b2c-20ab3c
65. 2ax2-5x+2ax-5
66. 4x3+4x2-25x-25
67. (1-xy)2-(y-x)2
68.mx2-m2-x+1
69.a2-2ab+b2-1
70.5x2-45
71.81x3-9x
72.x2-y2-5x-5y
73.x2-y2+2yz-z2
74. xy2-2xy-3x-y2-2y-1
75.y2(x-y)+z2(y-x)