Question: Parametric plots

I've asked this question before but this time around there's a new twist. I want to plot a parametric plot of the function below. z is Complex and i'm plotting the roots of z in the numerator to the roots of z in the denominator.

6*(20*z^5+137*z^4+450*z^3+850*z^2+900*z+420))

/(300*z^6-1490*z^5+4197*z^4-7800*z^3+9600*z^2-7200*z+2520)

hope it makes sense this time around.

 

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