The answer ti the question is. c
Answer:

Step-by-step explanation:
√(- 9 ) / (( 4 - 7 i ) - ( 6 - 6 i )) = 3 i / ( 4 - 7 i - 6 + 6 i ) =
= 3 i / ( - 2 - i ) = - 3 i / ( 2 + i ) =

=
- 1 - 2 i
The answer is 8.99 in decimal form
In exact for it In (1.838)/ In (1.07)
I hope one of them helps