Hi
I want to compute the following GCD,
GCD(x^4+x^2+1,x^4-x^2-2*x, x^3 - x^2-4 * x+4 )
I wrote it as
R .< x, y ,z> =PolynomialRing(QQ,3); f=x^4+x^2+1; g=x^4-x^2-2*x; h=x^3-1;
k= f.gcd(g)
w=k.gcd(h)
w
Is it the correct form? or I should try any other commands?