We have

so this is indeed a difference of squares. Factorizing would give

making the answer D.
We can further factor the first term here and write

but that's clearly out of the scope of this question.
 
        
             
        
        
        
Answer:
The equation that will determine the cost of two folders is;  3x = 2× $2.91
and  the cost of  the 2 folders is $1.94
Step-by-step explanation:
To solve this problem, we will follow the steps below;
Using proportion;
Let x be the cost of 2 folders
3 folders = $2.91
 2 folders  =  x
Cross-multiply
3x = 2× $2.91
The equation that will determine the cost of two folders is 
3x = 2× $2.91
We can go ahead and solve
3x = $5.82
Divide both-side of the equation by 3
 =
  =  
x = $ 1.94
The cost of 2 folders is $1.94
 
        
                    
             
        
        
        
Answer:
see the procedure
Step-by-step explanation:
The situation could be
Alice needs to divide 1/4 pound of meat into three equal parts. What is the weight of each part?
so
Divide 1/4 by 3

The weight of each part is 