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Question: how can I extract real and polar eigenvalue in this part?

Question:how can I extract real and polar eigenvalue in this part?

siamak taghavi 35
November 25 2014
0

I have a characteristic equation. some times It has polar roots . sometimes It has real roots and sometimes both of them.

I want to extract real roots and extract polar roots if they are.

for instance:

q:=m3*r^3+m2*r^2+m1*r+m0:

rot:=solve(q=0,r);

I want to know how can I use if in this part ?
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