By using Pythagoras theorem :
Correct choice is B
Answer:
The choice B) 11.4
Step-by-step explanation:
5+11i-16-4i+9i
5-16+11i-4i+9i
-11+7i+9i
-11+16i
First, get the like terms together. Then add or subtract until its simplified. Simplified is -11+16i.
A is the best question