- 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!
You have three formulas to learn. There is only one explained. How to get the others?