Question 198181
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 2x^2 + x - 1 = 0]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ a = 2], *[tex \LARGE b = 1], and *[tex \LARGE c = -1]


The quadratic formula is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x = \frac{-b \pm sqrt{b^2 - 4ac}}{2a} ]


Just plug in the values for *[tex \LARGE a], *[tex \LARGE b], and *[tex \LARGE c ] and do the arithmetic.


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