Question 20
Let $a,$ $b,$ $c,$ $d,$ $e,$ $f,$ $g$ and $h$ be distinct elements in the set $$
\{-7, -5, -3, -2, 2, 4, 6, 13\}.
$$ What is the minimum possible value of $$
\begin{aligned} &(a + b + c + d)^2 \\ &\quad {}+ (e + f + g + h)^2? \end{aligned}
$$
\{-7, -5, -3, -2, 2, 4, 6, 13\}.
$$ What is the minimum possible value of $$
\begin{aligned} &(a + b + c + d)^2 \\ &\quad {}+ (e + f + g + h)^2? \end{aligned}
$$