Euclidean quotient : quo

quo returns the euclidean quotient q of the Euclidean division between two polynomials (decreasing power division) If the polynomials are represented as expressions, the variable may be specified as a third argument.
Input :

quo(x^2+2*x +1,x)

Output :

x+2

Input :

quo(y^2+2*y +1,y,y)

Output :

y+2

In list representation, the quotient of x² + 2x + 4 by x² + x + 2 one can also input :

quo([1,2,4],[1,1,2])

Output :

[1]

that is to say the polynomial 1.