Answer:
7x -4= -28
Step-by-step explanation:
Answer:
56.7
Step-by-step explanation:
Just Add all numbers
Answer:
9-6.92820323i Nothing else can be done.
Step-by-step explanation:
-48 is not a perfect square but 81 is a square. When you try to square -48 it comes to be 6.92820323i.