Answer:
Step-by-step explanation:
Hey B is the correct answer as the x is negative and y is positive
Hope this helps!!!
 
        
                    
             
        
        
        
Explanation:
Since we have given that

Now, we have to prove it as 

Now, start the iterations:

So, first blank will be filled with 

Second blank will be filled with 

Hence proved.
 
        
             
        
        
        
8x^2-50 is your answer hopes this helps