Pasted

box% octave
GNU Octave, version 5.2.0
Copyright (C) 2020 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.
 Octave was configured for "x86_64-pc-linux-gnu".
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 octave:1> plot(roots([1,0,0,0,4]), 'ro')
octave:2>