A 2 4 b 2 9 July 8, 2019 16 32 64 128 4 a b 2 9 ab 2 A 4 2 b 5 2 9 A 2 b 2 4b 96 A 2 6a 4b 2 9 A 4 2 b 7 2 c 7 9 A 3 2 b 4 2 c 9 2 0 A 4 6a 2 b 2 9b 4 If a 2 b 2 9 and ab 4 If a 4 2 b 7 2 c 7 9 4 9 * a 2 b 2 4 3 * ab 16a 4 36 a 2 b 2 81b 4 91 4 a b 2 9 c d 2 The points a 4 2 b 7 2 c 0 9
