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## Homework Statement

Using the fact that the integral from -Infinity to Infinity of e^-x^2 is equal to Sqrt(Pi), find the integral from -Infinity to Infinity of x^2 * e^-x^2

## Homework Equations

## The Attempt at a Solution

I really dont know how to find this using the fact that the first integral is equal to Sqrt(Pi), where do you start on this one?

Thanks for the help