Question 248466
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y^2\ =\ 20]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y^2\ -\ 20\ =\ 0]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \left(y\ +\ \sqrt{20}\right)\left(y\ -\ \sqrt{20}\right)\ =\ 0]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \left(y\ +\ 2\sqrt{5}\right)\left(y\ -\ 2\sqrt{5}\right)\ =\ 0]


You should be able to handle it from here.


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