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Oscar Reutersvard's Penrose Square -- Solve the quadratic.
Connect the answers in order, perhaps w/a straightedge.
Start a new line.
1. x - 8x + 16 = 0
2. (x + 1)(x + 2) = 0
3. x - 7x +12 = 0
Start a new line.
4. x + 3x = - 2
5. (x - 2)(x - 4) = 0
Start a new line.
6. x + 1x - 6 = 0
7. x - 3x - 10 = 0
8. x - 6x + 9 = 0
9. x = 6x - 8
10. x + x = 6
11. (x - 6) = 0
12. x + 5x + 9 = - x
13. x + 1 = - 2x
14. x + 8x + 16 = 0
15. x + 14x + 49 = 0
16. x - 6x + 5 = 0
17. x + 7x + 10 = 0
18. x - x - 6 = 0
Start a new line.
19. x - 3x - 4 = 0
20. x + x - 20 = 0
21. x - 18x + 81 = 0
22. x - 10x + 24 = 0
23. x + 12x + 36 = 0
24. (x + 5) = 0
25. x - 8x + 15 = 0
26. x + 16x + 64 = 0
27. x(x + 1) = 0
28. x - 5x + 6 = 0
29. x - 4x + 4 = 0
30. x - 6x + 9 = 0
Start a new line.
31. x + 10x + 25 = 0
32. - x + 5x - 6 = 0
33. x - 5x = 0
34. x = 0
35. x - 8x + 16 = 0
36. x(x-1)(x-2) = 0
37. x - 3x - 10 = 0
Start a new line.
38. x -3x +2x = 0
39. 12 + x = 7x
40. x - 2x + 1 = 0
41. (x - 8) = 0
42. x - 10x + 5 = - 20
43. x + 4x + 4 = 0
44. x - 7x + 6 = 0
45. x - 5x - 6 = 0
46. x + 7x + 12 = 0
47. x + 7x + 6 = 0