# Hyperbola ContourPlot missing input

I'm trying to plot a hyperbola using ContourPlot, but I can't understand what I'm missing on its call. The error says it's incorrect syntax, although I can't see any errors.

ContourPlot[8x^2-3y^2==24*22^2 , {x,-200,200} , {y,-200,200}]


The hyperbola's standard equation is

• Maybe you had some previous assignments to the symbols x or y. Evaluate that line (and that line only) with a fresh kernel. – Hector Aug 2 '18 at 0:04