3a 2 )- 3 5a 7 July 8, 2019 16 32 64 128 − 4 3a 2 )+ 3 5a 7 2a 3 5a 2 7a )+( 3a 4 a 5 7a 2 5a 3 3a 2 2a 4 If a 3 5a 2 3a 7i 0 then a inverse is 3a − 3 7 5a − 9 2 a If a 3 5a 2 3a 7 0 then a inverse is 3a 5
