Step-by-step explanation:
option A ... that is 6.4 is the right answer
Answer:
1st one 6.4
C^2= a^2 +b^2
C^2 = 5^2 + 4^2
C^2 = 25 + 16
C^2= 41
Root of 41 is 6.4
Answer: D
(3 + 2i) (3-2i) = 13
