5 2c 4 )= 2 c 11 July 8, 2019 16 32 64 128 1) (c - 5)/(c ^ 2 - 4c) / ((c - 5)/(5c - 20)) 5c 2 =9 4 5c-2 3c+0 2c 4 5 =−4c+ 4 1
