Solution
= Solution
For a monic <polynomial> of degree five, <Vieta's formulas> give the product of its <polynomial roots> as $(-1)^5$ times its constant coefficient. Therefore
$$
\boxed{\prod_{j=1}^5z_j=-8.}
$$
= Solution
For a monic <polynomial> of degree five, <Vieta's formulas> give the product of its <polynomial roots> as $(-1)^5$ times its constant coefficient. Therefore
$$
\boxed{\prod_{j=1}^5z_j=-8.}
$$