X 7 2 3 9 2 5 July 8, 2019 16 32 64 128 4 9 3 7 x 2 5 2 2x 7 3 x 9 2 5 2 5 2 x 7 3 x 9 2 x 11 13 29 7 12 x 3 2 5 7 12 x 9 2 5 5 x 7 = 35 (x - 7) ^ 2 = (9 - x) ^ 2