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Help !! plot roots of an expression
I have a polynomial. A simple example is like this (w-w1) (w + 2 q +en^2 + s w^3) + r The actual example is more complicated. It is a function of several variables e.g. q, en, s, r etc.. I also need to Collect & FullSimplify this expression. Finally, from that result, I want to plot the roots of this polynomial (imaginary & real part) vs. q (say) or vs en etc.. other variables can be given fixed values. I'll the thankful if you give me hints how to do this!!