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how do i plot a parabola in the x=2 plane?

I apologize, for I am very new to sage. Here is what I input; the error was that y was not defined. f(x)=x^2 P=implicit_plot3d(lambda x,y,z:x-2,(-2,2),(-2,2),(-2,8)) plot(f)+plot3d(P)

 2 None vdelecroix 7197 ●17 ●81 ●158 http://www.labri.fr/pe...

how do i plot a parabola in the x=2 plane?

I apologize, for I am very new to sage. Here is what I input; the error was that y was not defined. defined.

f(x)=x^2
P=implicit_plot3d(lambda x,y,z:x-2,(-2,2),(-2,2),(-2,8))
plot(f)+plot3d(P)plot(f)+plot3d(P)