Answer: (1+2a)^2 or (1+2a)(1+2a)
Step-by-step explanation:
 
        
                    
             
        
        
        
If you need any steps explained lmk
 
        
        
        
Given:
The recipe calls for  cup of strawberries for each gallon of lemonade.
 cup of strawberries for each gallon of lemonade. 
Tia has 6 cups of strawberries.
To find:
The number of gallons of lemonade she can make.
Solution:
We have,
 cup of strawberries for = 1 gallon of lemonade
 cup of strawberries for = 1 gallon of lemonade
 cup of strawberries for =
 cup of strawberries for =  gallons of lemonade
 gallons of lemonade
                                         =  gallons of lemonade
 gallons of lemonade
                                        =  gallons of lemonade
 gallons of lemonade
 cup of strawberries for =
 cup of strawberries for =  gallons of lemonade
 gallons of lemonade
                                          =  gallons of lemonade
 gallons of lemonade
                                         =  gallons of lemonade
 gallons of lemonade
Therefore, 9 gallons of lemonade she can make by using 6 cups of strawberries.
 
        
             
        
        
        
X >- 5 
-2x -4 < 3x +21
 +4 +4
-2x < 3x +25
 -3x -3x
-5x < +25
-5x/-5 25/-5
X > -5
        
             
        
        
        
use the Pythagoras theorem method 
a squared plus b squared equals c square