# How do I integrate ?

1. Jul 15, 2006

### futb0l

$$\int{ \frac{x^2}{\sqrt{4-x^2}} }$$

How would I do that?
I tried integrating by parts, letting u = x^2 and v' = 1/sqrt(4-x^2) and many other combinations, but I just can't seem to get the result.

2. Jul 15, 2006

### matt grime

A trig substitution will work, surely.

3. Jul 15, 2006

### HallsofIvy

Let $x= 2 sin(\theta)$