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Canonical form : canonical_form

canonical_form takes as argument a trinomial of second degree.
canonical_form returns the canonical form of the argument.
Example :
Find the canonical form of :

x2 - 6x + 1

Input :
canonical_form(x^2-6*x+1)
Outpout :
(x-3)^2-8



giac documentation written by Renée De Graeve and Bernard Parisse