Okay, with that, after cancelling out the -4 in denominator and numerator, i get 4*sqr5.You should factor and not distribute. If you did not distribute the 4, then you probably would have seen that the factor of 4 in the numerator and the factor of 4 in the denominator cancels out.
Then you did not cancel the 4s correctly. Go back to the beginning of the work you'd posted, and multiply only the conjugates. Then you'll have:after cancelling out the -4 in denominator and numerator, i get 4*sqr5