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A visual proof that a^2 – b^2 = (a + b)(a – b)


A visual proof that a2 – b2 = (a + b)(a – b). Sophie Germain wrote, “It has been said that algebra is but written geometry and geometry is but diagrammatic algebra.”

A visual proof that a 2 – b 2= ( a+ b)( a – b). Sophie Germain wrote, “It has been said that algebra is but written geometry and geometry is but diagrammatic algebra.”

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Photo of b^2

b^2

Photo of visual proof

visual proof