Answer: this might help you
Step-by-step explanation:
 
        
             
        
        
        
12 ^3  and 11^3   haven't got the same base  so the rules of exponents do not apply.
Bases have to be the same:-  for example 12^3 * 12*3  = 12 ^(3+3)  = 12^6
        
             
        
        
        
It’s probably 10 given proof
        
             
        
        
        
1/2 is equivalent to 5/10 not 2/10