Question 189072
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It is the difference of two squares:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ a^2\, -\, b^2\ =\ (a\,+\,b)(a\,-\,b)]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3x\,\cdot\,3x\ =\ 9x^2] and


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 8\,\cdot\,8\ =\ 64]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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