Something tells me I can't, but I also feel I can because the integral is going to be messy if I integrate directly with trig substitution.
The integral comes from a physics problem I am doing.
$V(x) = k\lambda\int_{0}^{a} \dfrac{ d\ell}{\sqrt{x^2 + \ell ^2}}$
$a$ is a constant, but I can let change $a$ to a variable like $h$
I am trying to find $-\dfrac{dV}{dx}$
The only thing that's bothering me is that x inside the integrand and setting $\ell = x$ after I apply chain rule would get me a $\sqrt{2}$ and I don't think the answer is going to come out this nice.