I am having trouble with the algebra. The limit of a rational function is found by substitution. But in the case of an indeterminate as this one I must factor, rationalize, combine rational expressions, etc... to simplify into an equivalent function. Then find the limit of the equivalent function by substitution. Can someone please help. I have been trying to figure this out for about six hours. Is there a method that I am unaware of for finding the common denominator and subtracting these three expressions so I can sunstitute and get the limit. My calculator soves the problem but I need to know how to do it by hand.