Quarter Squares Rule
See also
Algebraic IdentityExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Quarter Squares Rule." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/QuarterSquaresRule.html
Weisstein, Eric W. "Quarter Squares Rule." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/QuarterSquaresRule.html