Answer: B 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Given equation: 
when we complete the square , we take half of the value of 8 , then square it, and added to the left sides, we get;

∵8 is the value 
Notice that, we add this both sides so that it maintains the equality.
then;

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Simplify:

The number must be added to complete the square is, 
 
        
                    
             
        
        
        
Answer:
Sorry this is late, but it could help future people. Answers are in the picture.
Step-by-step explanation:
I took the quiz. :)
 
        
                    
             
        
        
        
Answer:
The answer is c!
Step-by-step explanation:
 
        
             
        
        
        
The area including cutout is 15*8=120
the area of cutout is 5*5=25
120-25=95 cm²