Multiply polynomials

We can multiply polynomials by using single point evaluation and then reconstruction with genpoly.

> poly1 := 2*x^4+x^3+7*x^2+8*x+6;

> poly2 := 3*x^4+5*x^3+9*x^2+4*x+3;

> value1 := subs(x=1000,poly1);

> value2 := subs(x=1000,poly2);

> v12 := value1*value2;

> ans := sort(genpoly(v12,1000,x));

Check with expand

> p12 := expand(poly1*poly2);

> zero3 := p12-ans;