True, all of them represent a negative number, for example:
You have $60 and you spent $10, the remaining money is:

Your savings are $1000 and you make a Withdrawal of $500:

In other words for calculation purposes, they all have negative values
 
        
             
        
        
        
Stick change flip 
5/6 x 10/3 = 50/18 2 14/18 simplify 2 7/9
        
                    
             
        
        
        
Check the picture below.

since the distance AB cannot be a negative value, thus is not -3-√(130).
 
        
        
        
Answer:
The geometric mean of 2 and 8 comes out to equal 4. 
Step-by-step explanation: