How do I find the real valued solutions to $3x - x^3 = \sqrt{(x + 2)}$.
http://www.wolframalpha.com/input/?i=3x+-+x%5E3+%3D+sqrt%28x+%2B+2%29
Here we see three intersections of the two graphs $f(x) = 3x - x^3$ and $g(x) = \sqrt{(x + 2)}$. I don't see how this is possible since the two complex solutions are "plotted" even though the axes are real-valued.