The to that problem is 56
        
             
        
        
        
2+4=4+2 is an example of commutative property of addition
        
                    
             
        
        
        
Multiply and divide by the product of the denominators.
 
 
        
        
        
To find the vertex, you need to find the axis of symmetry first. 
In order to find the axis of symmetry we have to do -b/2a. 
In our case, the b is -8 and the a is 1. 
Plug it in. 
-(-8)/2(1) 
8/2 = 4 
Our axis of symmetry is 4. 
Now, we plug it into the equation to find the rest of the vertex. 
y = 4^2 - 8(4) + 1 
y = 16 - 32 + 1 
y = -16 + 1 
y = -15 
Put it together. 
Our vertex is (4,-15). 
 
        
             
        
        
        
Answer:
4(x + 1) and 4(x - (-1))
Step-by-step explanation:
4(-1 + 1) = 4(0) = 0
(4 (-1) + 5) = -4 +5 = -1
4(-1 - 1) = 4(-2) = -8
(5 - 4(-1)) = 5 + 4 = 9
4(-1 - (-1)) = 4(0) = 0
4 (-1 + (-1)) = 4(-2) = 8