Only part of the graph shown

[liudonghua123]

I just want to show the graph of y^2=x^3-3x+2, but acturally only upper half the graph shown. I have to add the other part of it manually.

[Arnalv]

what is happening here is that the calculator takes y^2=x^3-3x+2 and converts it to this y=sqrt(x^3-3x+2). See if there is a way to graph it by changing the equation a bit.