Hey, need help with some calculus stuff.

if f(x) = (sqrt(2x+5)-sqrt(x+7)) / (x-2) for x ≠ 2, and if f is continuous at x = 2, then k = ?

f(2) = k

Sorry, I don't know how to do the symbols, so I had to type it out like this. sqrt = square root.

I also need to know how you do it, not just the answer.

Thanks in advance for the help. I really appreciate it.