Question

(3-4i) . (3+4i) - 2. (3-i)

Answer 1

(3-4i).(3+4i) -2.(3-i)=

9+12i -12i -16i² -6 +2i=

9 - 16i² -6 +2i=

lembrando que i²=-1

9 +16 -6 +2i=

9+10+2i=

19+2i