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GeoGebra

Binomic Formula

作成者:Max Born
Geometry was first, algebra is based on geometry. How to prove: (a+b)²=(a²+2ab+b²) (a-b)²=(a²-2ab+b²) (a+b)(a-b)=(a²-b²) It is such simple! Just move the Points B or D an try to detect the equivalence of the areas!

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