Question 395231
The algebra will take a while, but I'll get you started:


If r is a root of some polynomial f(x), then x-r is a factor of the polynomial. Since -2 is a root, then x+2 is a factor. You can divide f(x) by x+2 either using long division or synthetic division to obtain a quadratic. Once you have the quadratic, find the other two roots, and then you can write the polynomial as a product of linear factors.