Answer:
Subtraction property of equality
Step-by-step explanation:
The subtraction property of equality refers to balancing an equation by using the same mathematical operation on both sides.
 
        
             
        
        
        
Hope this helps! Don’t mind the part I crossed off.
 
        
        
        
The fully factored polynomial is −3(x−6)(x+6).
        
             
        
        
        
☁️ Answer ☁️ 
n = 3
Hope it helps. 
Have a nice day noona/hyung  ̄▽ ̄