This is going to be an easy one

but I have to solve the square root of (2x+1) using the definition of limit.

I set the problem up f(x) lim h-> 0 sq root (2x + h + 1) - sq root (2x + 1) / h then I multiplied by the conjugate.

That gave me (2x + h + 1) - (2x + 1) / h (sq root 2x + h + 1) + (sq root 2x+1)

I am not sure where to go from here. How do I simplify it? I know the answer I just don't see how to get there. Thanks!!