Persiapan Ulangan 2

Jawab: A

\begin{equation*}
\begin{split}
& U_1 + U_2 + U_3 + U_4 \\\\
& \left|1 - \sqrt{5}\right| + \left|2 - \sqrt{5}\right| + \left|3 - \sqrt{5}\right| + \left|4 - \sqrt{5}\right| \\\\
& - \left(1 - \sqrt{5}\right) - \left(2 - \sqrt{5}\right) + 3 - \sqrt{5} + 4 - \sqrt{5} \\\\
& -1 + \sqrt{5} - 2 + \sqrt{5} + 3 - \sqrt{5} + 4 - \sqrt{5} \\\\
& 4
\end{split}
\end{equation*}