Find arc length given

y = x^(3/2) - 1 over [0,1].

Let INT be the integral symbol.

I was able to construct the integral but after plugging the

limits x = 0 to x = 1, I get a different answer every time.

Here is the integral:

INT sqrt{1 + (9x/4)} dx from

x = 0 to x = 1.

The correct answer is 1.43971 according to the wolfram website.

Can someone do this one for me step by step?