Difference of Two Squares (1) 平方差公式(一) - GeoGebra Institute of Hong Kong

Key Stage 3 (Junior Secondary)‎ > ‎3.1 Number & Algebra 數與數系‎ > ‎Identities 恒等式‎ > ‎

Difference of Two Squares (1) 平方差公式(一)

Proof without words shared by alexchik.

http://www.geogebratube.org/material/show/id/17333 (Download GeoGebra file)

Modified slightly.

http://www.geogebratube.org/material/show/id/17379 (Download GeoGebra file)

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