So for whatever reason we don't like it when the radical is in the denominator so we're going to do a process called rationalization and get rid of it. We do this by multiplying both the numerator and denominator by the radical
So for the first part we multiply the numerator and denominator by which gives us we can then factor the 28 into sqrt(7,2,2) which simplifies to /28 So then we can simplify this and get We then can simplify the rest of these radicals and get and This means that so far we have the following: We can add the like terms and simplify the fraction and get 4/3−4√5+13√7