初二一元二次因式分解的练习题40道-简单一点的 急!!!!


1. xy+6-2x-3y
2. x2(x-y)+y2(y-x)
3. 2x2-(a-2b)x-ab
4. a4-9a2b2
5. ab(x2-y2)+xy(a2-b2)
6. (x+y)(a-b-c)+(x-y)(b+c-a)
7. a2-a-b2-b
8. (3a-b)2-4(3a-b)(a+3b)+4(a+3b)2
9. (a+3)2-6(a+3)
10. (x+1)2(x+2)-(x+1)(x+2)2
11. abc+ab-4a
12. 16x2-81
13. 9x2-30x+25
14. x2-7x-30
15. x2-25
16. x2-20x+100
17. x2+4x+3
18. 4x2-12x+5
19. 3ax2-6ax
20. x(x+2)-x
21. x2-4x-ax+4a
22. 25x2-49
23. 36x2-60x+25
24. 4x2+12x+9
25. x2-9x+18
26. 2x2-5x-3
27. 12x2-50x+8
28. (x+2)(x-3)+(x+2)(x+4)
29. 2ax2-3x+2ax-3
30. 9x2-66x+121
31. 8-2x2
32. 9x2-30x+25
33. -20x2+9x+20
34. 12x2-29x+15
35. 36x2+39x+9
36. 21x2-31x-22
37. 9x4-35x2-4
38. (2x+1)(x+1)+(2x+1)(x-3)
39. 2ax2-3x+2ax-3
40. x(y+2)-x-y-1
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