How to plot circle with Maxima? I cannot get equitation plotted
Expression:
f1: (x^2) + (y^2) = 9;

I try this command:
wxplot2d(f1, [x, -5, 5], [y, -5, 5]);

And it gives:
plot2d: expression evaluates to non-numeric value everywhere in plotting range.
plot2d: nothing to plot.

What is correct way to plot such expressions?

I ended with qdraw:
(load(draw), load(qdraw));
f1: (x^2) + (y^2) = 9;
qdraw(imp(f1, x, -4, 4, y, -4, 4));

