Question 44139
The key technique in rational expressions is to FACTOR and CANCEL...that's what we do here...so from
4r^2 - 25s^2 / 2r^2 + 3rs - 20s^2 =
(2r+5s)(2r-5s) / (2r-5s)(r+4s) =
(2r+5s) / (r+4s)