Z = 3 – 4I  Z 3 4I 2Z Z 2(3 4I) 3 4I 9 4I      25I 25I 25I(3...

Câu 5.a : z = 3 – 4i  z 3 4i 2z z 2(3 4i) 3 4i 9 4i      25i 25i 25i(3 4i) 4 3i    

2

2

z 3 4i 3 4 