As usual, we need to convert the radicals to powers in the numerator:

Notice how the exponent in the parentheses does not change.

Now we can try a substitution:

Let , and . We can use this to evaluate the indefinite integral, , using the power rule for integration:

Now we can substitute to get an expression in terms of x:

.

Finally, we can apply the Fundamental Theorem of Calculus to get the required definite integral: