Quarter Squares Rule

Author

Eric W. Weisstein
December 9, 2008

This notebook downloaded from http://mathworld.wolfram.com/notebooks/Algebra/QuarterSquaresRule.nb.

For more information, see Eric's MathWorld entry http://mathworld.wolfram.com/QuarterSquaresRule.html.

©2008 Wolfram Research, Inc. except for portions noted otherwise

Identity

FullSimplify[(((((a+b)/2)))^2)-(((((a-b)/2)))^2)]