以下是一元二次方程的50道计算题，每道题都附有答案：
1. 解方程：x2 5x + 6 = 0
2. 解方程：2x2 8x + 4 = 0
3. 解方程：x2 2x 15 = 0
4. 解方程：x2 + 4x + 4 = 0
5. 解方程：x2 3x 10 = 0
6. 解方程：x2 + 6x + 9 = 0
7. 解方程：x2 6x + 8 = 0
8. 解方程：x2 + 5x 6 = 0
9. 解方程：2x2 3x 2 = 0
10. 解方程：x2 4x 12 = 0
11. 解方程：x2 + 2x 15 = 0
12. 解方程：x2 8x + 7 = 0
13. 解方程：2x2 + 5x + 2 = 0
14. 解方程：x2 5x + 6 = 0
15. 解方程：x2 + 7x + 10 = 0
16. 解方程：x2 2x 3 = 0
17. 解方程：2x2 + 3x 2 = 0
18. 解方程：x2 7x + 12 = 0
19. 解方程：x2 + 4x 5 = 0
20. 解方程：x2 6x + 5 = 0
21. 解方程：2x2 9x + 4 = 0
22. 解方程：x2 10x + 25 = 0
23. 解方程：x2 + 8x + 15 = 0
24. 解方程：x2 11x + 28 = 0
25. 解方程：2x2 5x 3 = 0
26. 解方程：x2 + 3x 4 = 0
27. 解方程：x2 9x + 20 = 0
28. 解方程：x2 + 2x 3 = 0
29. 解方程：2x2 + 6x 3 = 0
30. 解方程：x2 7x 6 = 0
31. 解方程：x2 + 9x + 20 = 0
32. 解方程：2x2 4x 6 = 0
33. 解方程：x2 + 5x 14 = 0
34. 解方程：x2 8x 7 = 0
35. 解方程：2x2 3x 8 = 0
36. 解方程：x2 + 10x + 25 = 0
37. 解方程：x2 12x + 35 = 0
38. 解方程：2x2 + 7x 15 = 0
39. 解方程：x2 11x + 18 = 0
40. 解方程：x2 + 6x 16 = 0
41. 解方程：2x2 2x 3 = 0
42. 解方程：x2 + 7x + 6 = 0
43. 解方程：x2 10x + 21 = 0
44. 解方程：2x2 + 8x + 4 = 0
45. 解方程：x2 13x + 40 = 0
46. 解方程：2x2 6x 18 = 0
47. 解方程：x2 + 11x + 30 = 0
48. 解方程：x2 14x + 49 = 0
49. 解方程：2x2 + 9x + 4 = 0
50. 解方程：x2 8x 20 = 0
答案如下（每道题的解为x的两个根）：
1. x = 2, x = 3
2. x = 1, x = 2
3. x = 5, x = -3
4. x = -2, x = -2
5. x = 5, x = -2
6. x = -3, x = -3
7. x = 2, x = 4
8. x = -1, x = 6
9. x = -1, x = 2
10. x = -4, x = 3
11. x = -5, x = 3
12. x = 1, x = 7
13. x = -1, x = -2
14. x = 2, x = 3
15. x = -2, x = -5
16. x = -1, x = 3
17. x = -1, x = 2/3
18. x = -3, x = -4
19. x = -1, x = 5
20. x = -1, x = 5
21. x = 1, x = 2/3
22. x = -5, x = -5
23. x = -5, x = -3
24. x = -7, x = -4
25. x = 1, x = 3/2
26. x = 4, x = -1
27. x = -2, x = -5
28. x = -1, x = 3
29. x = 1, x = -3/2
30. x = -2, x = 3
31. x = -5, x = -4
32. x = 1, x = -3
33. x = -2, x = -7
34. x = 1, x = 7
35. x = -4, x = 1/2
36. x = -5, x = -5
37. x = -7, x = -5
38. x = -5, x = -3/2
39. x = -6, x = -3
40. x = -8, x = 2
41. x = 1, x = -3
42. x = -1, x = -6
43. x = -7, x = -3
44. x = -2, x = -2
45. x = -8, x = -5
46. x = 3, x = -3
47. x = -5, x = -6
48. x = -7, x = -7
49. x = -2, x = -1
50. x = 4, x = -5
请注意，这里提供的答案仅供参考，实际解题过程中可能需要使用求根公式或其他方法。
