Question 14
All the roots of the polynomial $$
\begin{aligned} &z^6-10z^5+Az^4+Bz^3\\ &\quad+Cz^2+Dz+16 \end{aligned}
$$ are positive integers, possibly repeated. What is the value of $B?$
\begin{aligned} &z^6-10z^5+Az^4+Bz^3\\ &\quad+Cz^2+Dz+16 \end{aligned}
$$ are positive integers, possibly repeated. What is the value of $B?$