Question 1099077
Ways to make product {{{-9}}} using integers:
{{{system(-1*9,-9*1,-3*3)}}}


Quadratic Trinomials using those:
{{{(x-1)(x+9)=x^2+8x-9}}}
{{{(x+1)(x-9)=x^2-8x-9}}}
{{{cross((x-3)(x+3)=x^2+0x-9)}}} but this is not a trinomial.



{{{highlight(system(k=-8,OR,k=8))}}}