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© 2008, A. Azzolino   www.mathnstuff.com/papers/condots/prose.htm
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     {4}
2. (x + 1)(x + 2) = 0     {-1, -2}
3. x - 7x +12 = 0     {3, 4}
Start a new line.
4. x + 3x = - 2     {-1, -2}
5. (x - 2)(x - 4) = 0     {2, 4}
Start a new line.
6. x + 1x - 6 = 0     {2, -3}
7. x - 3x - 10 = 0     {-2, 5}
8. x - 6x + 9 = 0     {3}
9. x = 6x - 8     {2, 4}
10. x + x = 6     {2, -3}
11. (x - 6) = 0     {6}
12. x + 5x + 9 = - x     {-3}
13. x + 1 = - 2x     {-1}
14. x + 8x + 16 = 0     {-4}
15. x + 14x + 49 = 0     {-7}
16. x - 6x + 5 = 0     {1, 5}
17. x + 7x + 10 = 0     {-2, -5}
18. x - x - 6 = 0     {-2, 3}
Start a new line.
19. x - 3x - 4 = 0     {-1, 4}
20. x + x - 20 = 0     {4, -5}
21. x - 18x + 81 = 0     {9}
22. x - 10x + 24 = 0     {4, 6}
23. x + 12x + 36 = 0     {-6}
24. (x + 5) = 0     {-5}
25. x - 8x + 15 = 0     {3, 5}
26. x + 16x + 64 = 0     {-8}
27. x(x + 1) = 0     {0, -1}
28. x - 5x + 6 = 0     {2, 3}
29. x - 4x + 4 = 0     {2}
30. x - 6x + 9 = 0     {3}
Start a new line.
31. x + 10x + 25 = 0     {-5}
32. - x + 5x - 6 = 0     {3, 2}
33. x - 5x = 0     {0, 5}
34. x = 0     {0}
35. x - 8x + 16 = 0     {4}
36. x(x-1)(x-2) = 0     {0, 1, 2}
37. x - 3x - 10 = 0     {-2, 5}
Start a new line.
38. x -3x +2x = 0     {0,1,2}
39. 12 + x = 7x     {3,4}
40. x - 2x + 1 = 0     {1}
41. (x - 8) = 0     {8}
42. x - 10x + 5 = - 20     {5}
43. x + 4x + 4 = 0     {-2}
44. x - 7x + 6 = 0     {1, 6}
45. x - 5x - 6 = 0     {-1, 6}
46. x + 7x + 12 = 0     {-4, -3}
47. x + 7x + 6 = 0     {-1,-6}