A 2 6ab 2 9b 4 July 8, 2019 16 32 64 128 A 2 6ab 9b 2 4c a 3b 2c A 2 6ab 9b 2 49 A 2 6ab 9b 2 4c Simplify a 2 6ab 9b 2 4c 2 If a 2 9b 2 4c 2 6ab A ^ 2 - 6ab + 9b ^ 2 A ^ 2 + 6a + 9 - 6 2 - 9ab