Think of square numbers other than 1 which are

1. factors of 72. They are 4, 9, 36. The largest is 36
2. factors of 50. There is only one, 25.
3  factors of 128. They are 4, 8, and 64.  The largest is 64

Rewrite each as a product of two numbers one of which is the
largest possible square number



Write each as the product of two square roots:



Take the square roots of the square numbers:





They are like terms, just like 

Answer:  

Edwin