2025-06-21 17:07:35
等式两边同乘以1-2i 得:5z=(3-4i)(1-2i)=3-6i-4i-8=-5-10i
所以z= -1-2 i
2025-06-21 20:01:13
2025-06-21 17:47:49
2025-06-21 16:54:54