Write a Polynomial in Terms of Its Roots - Expii

If you know all the zeros of a polynomial, you can write the polynomial in a "factored form" using those roots (but don't forget to multiply by the leading coefficient of the polynomial). For example, 1 and 2 are the roots of 3x^2 - 9x + 6, so the polynomial factors completely as 3(x-1)(x-2).