Question 332895
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Principle of Zero Products:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ ab\ =\ 0\ \Leftrightarrow\ a\ =\ 0\ \text{ or }b\ =\ 0]


Hint:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -7\ \times\ -12\ =\ 84]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -7\ +\ -12\ =\ -19]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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