Câu hỏi 25

\(\begin{array}{l}{z^2} - 6z + 25 = 0 \Leftrightarrow \left[ \begin{array}{l}{z_1} = 3 + 4i\\{z_2} = 3 - 4i\end{array} \right. \Rightarrow \left| {{z_1}} \right| = \left| {{z_2}} \right| = 5\\ \Rightarrow \left| {{z_1}} \right| + \left| {{z_2}} \right| + {z_1}.{z_2} = 5 + 5 + \left( {3 + 4i} \right)\left( {3 - 4i} \right) = 10 + 25 = 35\end{array}\)

Chọn D.