Open in CoCalc
def racines(x): return [-sqrt(x),sqrt(x)]) plot(racines(x),(x,0,1))
%var x, y plot3d(racines(x+y)[0],(x,0,1),(y,0,1)) + plot3d(racines(x+y)[1],(x,0,1),(y,0,1))
3D rendering not yet implemented