Guys,

I recently got a practice problem to try based on something or other I did a few years back in school. Thought I could handle it but apparently not:

Rationalise the denominator of, and thus simplify the expression

$\displaystyle \frac{2\sqrt{2}}{4-\sqrt{14}} -2\sqrt{7}$

Now I whats getting me is the 4 - root 14 in the denominator. If it were simply root 14 I would be able to rationalise and simplify no problem.

Thanks.