For full functionality of this site JavaScript must be enabled.

Follow these instructions on how to enable JavaScript in your web browser and reload the page.

\( (a+b)(a-b)=?\) \((a>b) \)

Current sponsors:

Ministério da Educação, DGE, UP

Created on: 2007

Last update: 2024-12-05 16:14:19+0000

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.