The discussion centers on graphing equations involving three variables (x, y, z) using the TI-Nspire CX CAS calculator. The user expresses difficulty in graphing an ellipsoid and mentions their current method of solving for z, which involves dealing with square roots for positive and negative values. They note their success in graphing simpler shapes, like circles, but struggle with more complex forms. Another participant suggests using Wolfram|Alpha for assistance, but the original poster points out the limitation of not having a laptop during tests. The conversation also includes light-hearted comments about alternative ways to remember graphs, such as getting a tattoo.
