Answer:
Step-by-step explanation:
P+29=³√x
Find the cube of both side
(P+29)³=(³√x)³
(P+29)³=x
 
        
             
        
        
        
They will be perpendicular to their pre image 
good luck
        
             
        
        
        
The answer for the first on 8 and the second one is 9
        
                    
             
        
        
        
The least possible sum is 6 and 4. If your having problems, write down the factors and choose the pair that adds up the smallest number :)