Question 271325
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Factor out -1 to start:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -x^2\ +\ 6x\ -\ 8]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -\left(x^2\ -\ 6x\ +\ 8\right)]


Now note that -2 times -4 is +8 and -2 plus -4 is -6, so:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -\left(x\ -\ 2\right)\left(x\ -\ 4\right)]



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