Posted by eva on Friday, April 9, 2010 at 1:01pm.
2 x^2 - 2 x + 3 = 0
x = [2 +/- sqrt (2^2-4*2*3)] /4
= [ 2 +/- sqrt (4 - 24) ]/4
= [ 2 +/- sqrt (-20) ] / 4
- 20 is imaginary so this parabola never crosses the x axis.
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