I have been trying to find the archlength of , where 0 ≤ x ≤ 2.

I first solved .

Then I solved for y'.

.

The formula I have to find arclength is .

So I plugged in and got this:

.

I evaluated , because my book offers a formula for the form .

The formula was

My and my , so I plugged those into the formula.

What I got out was this:

This is what I got to. Now, I need to evaluate it from 0 to 2. But when I plug in 2 for the value of x, my answer is undefined. Did I do something wrong? Is there a different way to do this? Please...PLEASE help!