1/2/13; How do we add and subtract rational expressions?

How do we add and subtract rational expressions?

Adding and subtracting rational expressionals are much like cross multiplying or adding and subtracting fractions , for example ;

First find the common denominator : 1/x + x/2y
the common denominator would be :2xy

 Next, after finding the common denominators remember that whatever you multiply to the bottom you multiply to the top as well : 2y/2xy +x^2 /2xy

Now combine the expression : 2y +x^2 /2xy and that would be your final result