This is a puzzle cache, therefore it is not at the listed coordinates.
3x2 - 12x + 13 = 0do not solve these problems
3x2 - 2x + 9 = 0do not solve these problems
10x2 - 4x + 11 = 0do not solve these problems
6x2 + 5x + 10 = 0do not solve these problems
11x2 + 5x + 6 = 0do not solve these problems
If you completely and utterly admit defeat, email us for some help here.