和与积：二次因式分解的可视化引导

GeoGebra 命令及参数

1. Random((-max), max) → factor21
2. Random((-max), max) → factor22
3. Point(Circle[A, 5]) → B
4. Polygon(A, B, C, D) → poly1, a, b, c, d
5. Point(Circle[A_1, 5]) → B_1
6. Polygon(A_1, B_1, C_1, D_1) → poly1_1, a_1, b_1, c_1, d_1
7. Point(Circle[A_2, 5]) → B_2
8. Polygon(A_2, B_2, C_2, D_2) → poly1_2, a_2, b_2, c_2, d_2
9. Point(Circle[A_3, 5]) → B_3
10. Polygon(A_3, B_3, C_3, D_3) → poly1_3, a_3, b_3, c_3, d_3
11. Random((-max), max) → factor32
12. Random((-max), max) → factor31
13. Point(Circle[A_4, 5]) → B_4
14. Polygon(A_4, B_4, C_4, D_4) → poly1_4, a_4, b_4, c_4, d_4
15. Point(Circle[A_5, 5]) → B_5
16. Polygon(A_5, B_5, C_5, D_5) → poly1_5, a_5, b_5, c_5, d_5
17. Point(Circle[A_6, 5]) → B_6
18. Polygon(A_6, B_6, C_6, D_6) → poly1_6, a_6, b_6, c_6, d_6
19. Point(Circle[A_7, 5]) → B_7
20. Polygon(A_7, B_7, C_7, D_7) → poly1_7, a_7, b_7, c_7, d_7
21. Random((-max), max) → factor11
22. Random((-max), max) → factor12
23. Point(Circle[A_8, 5]) → B_8
24. Polygon(A_8, B_8, C_8, D_8) → poly1_8, a_8, b_8, c_8, d_8
25. Point(Circle[A_9, 5]) → B_9
26. Polygon(A_9, B_9, C_9, D_9) → poly1_9, a_9, b_9, c_9, d_9
27. Point(Circle[A_{10}, 5]) → B_{10}
28. Polygon(A_{10}, B_{10}, C_{10}, D_{10}) → poly1_{10}, a_{10}, b_{10}, c_{10}, d_{10}
29. Point(Circle[A_{11}, 5]) → B_{11}
30. Polygon(A_{11}, B_{11}, C_{11}, D_{11}) → poly1_{11}, a_{11}, b_{11}, c_{11}, d_{11}