# User:Un-Bedelato

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Revision as of 19:35, February 26, 2009 by Un-Bedelato (talk | contribs)

Assume a and b are real numbers.

We start with:

From this we can also conclude:

Square each side:

A negative times a negative is a positive:

Take the square root:

We get:

From our original equation b=-a:

This plainly shows that any number is equal to its negative.