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[Zamda]

I'm not exactly a mathematician, but I recently won this calculator. My brother picked it up, started playing with it, and then said OMG, it can't do this! Apparently the polynomial equation solver can't deal with imaginary roots (or complex numbers? whatever they are?)? It says No Real Roots, Press Exit, when if I do it on my brother's older calculator it works fine.

Now, I don't know what the hell this thing does, but I like hacking my gadgets around a bit and would be interested to know if there is a way to enable this? Would any of the geniuses here care to help me out?