About these Squares, they tell us that if it is a perfect square or not a perfect square like
e.g 9 is a perfect square it is a product of the same 2 numbers which is three x three = 9
Maybe, prime numbers almost can be square but that only can be divided by even numbders. not odd numbers.
So, Mr. Backe just told something we learned before Square roots not squares with roots under them with... um how about I show you :
It means that a number that when multiplied by itself equals a given value is the square root.the picture you are seeing is the Square root 4 of 2
so it is 2 squared (2) that equals to 4
so please comment what I did good or what I did bad or what I am missing PLEASE COMMENT >.<