The assignment is to find the integral between the two curves:
$y = 2x-x^2$ and $y = 3-2x$.

When finding integral by hand I get a negative answer. But doing `Integral(f, g, 1, 3)` in GeoGebra gives me a positive answer. The book also says it's positive.

[![problem](https://i.stack.imgur.com/n5GUM.png)](https://i.stack.imgur.com/n5GUM.png)

Is it because the integral between two curves always is an area? And area is always positive?