hi i had this problem on my test and did not find any way to solve it but im verry intressted how to solve it! plz any1 can help:O?

Write the expression https://webwork.math.su.se/webwork2_...eeb88ed941.png of the form https://webwork.math.su.se/webwork2_...ca422f7991.png, where K and L are rational numbers.