Which of the following equalities are valid? choose all that apply. (3^2+4)-2=11 (3^2+4-2=5 2*(3^2-1)=16 2*(3^2-11)=35

Remember that an equation is valid if it has the same value in both sides. Lets evaluate each one of the qualities separately to check their validity:
1. 
    
    
    
This one is valid. 

2. 
   
   
    
This one is not valid.

3. 
    
    
    
This one is valid.

4. 
    
    
    
This one is not valid.

We can conclude that the valid qualities are (3^2+4)-2=11 and 2*(3^2-1)=16

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