# Integral 2x((1-x^2)^(1/2))

1. Apr 28, 2016

### Wi_N

1. The problem statement, all variables and given/known data
Integral 2x((1-x^2)^(1/2))

2. Relevant equations

3. The attempt at a solution
ive tried integration by parts, i tried substitution and i cant get it to work. i also need to figure the integral when x=1 and i keep getting 0 in the numerator. What is the best point of attack?

2. Apr 28, 2016

You can use the chain rule for this integral. It is straightforward.

3. Apr 28, 2016

### LCKurtz

What happens when you try $u=1-x^2$?

4. Apr 28, 2016

### SteamKing

Staff Emeritus
From the way you've written the integrand, you don't have a denominator, so getting the numerator = 0 isn't that big a deal.

It's when the denominator = 0 that things blow up.