Find the difference. express your answer in simplest form. (2s/s^2-4s+4) - (4/s^2-4s+4)

To find the difference, we are going to destroy the parenthesis first, and then, we are going to perform the operations. Remember that to destroy a parenthesis preceded by a negative sign (-), you should change the signs of the factors inside the parenthesis:



Now we can factor both numerator and denominator and simplify:


We can conclude that the difference in simplest form is: 

To get started, combine -4s+4 with 4s - 4.  Result:  0.  That leaves

 2s        4          2(s+2)
- =
s^2      s^2           s^2