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Thanks a lot for the quick response, that does help. I am attempting to learn python as sagemath is coming in handy for a lot of engineering applications, time is tight though with dissertation looming. Do you know if there is a way of getting sagemath to then return a real number from the solutions rather than complex numbers?

My alternative if I cannot get a real number is to plot the function "B" and individually re-plot the graph to "home in" on the point it intersects the axis. This is time consuming and if I change a variable I start from scratch.

Thanks again for your help.