The answer is B,
Explanation: I did the math :)
Ummmmmmmmmmmm theeeee answerrrrrr isssssss 11,13
√(- 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
Answer: 375
Step-by-step explanation: If the problem was pythagorean theorem. Then I hope this explantion will help.
5 squared and 20 squared. 5 squared would get you 25 and 20 squared should get you 400. Then you should take 400-25=375. Your answer therefore is 375
I hope this helped!