You could simplify the top line to be...
A snippet from a calculus question however i am finding the simplifying of a rationalisation hard.
This needs to be rationalised
now i know i multiply both top and bottom by
but I'm having mega difficulty actually doing it and getting an equation that actually looks half decent at the end, if someone could just show me step by step, how to really simplify the equation I would be extremely grateful. Thanks.