Answer:
The element you add is 
Step-by-step explanation:
The element you add is 
Remember that

So, in order to complete the square you add 
But when you multiply times
you get

Answer:A?
Step-by-step explanation:
Answer:
A. Subtraction
B. Subtraction
C. x+4=11
-4 -4
D. x=7
Step-by-step explanation:
Answer:
8.
Step-by-step explanation:
91-35=56
56/7=8