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Numeric roots of a polynomial : proot

proot takes as argument a squarefree polynomial, either in symbolic form or as a list of polynomial coefficients (written by decreasing order).
proot returns a list of the numeric roots of this polynomial.
To find the numeric roots of P(x) = x3 + 1, input :
or :
Output :
To find the numeric roots of x2 - 3, input :
or :
Output :

giac documentation written by Renée De Graeve and Bernard Parisse