#2**+1 **

A Perfect square is when two rational numbers are multiplied together. That means no numbers such as 1.65, 5.89 etc.

sqrt(5) is a non perfect square as you get a irational number.

2.236...

Do you see what i mean?

StarStrike Feb 14, 2019

#3**+1 **

A square number is a number that is just one integer multiplied by itself. Squares can never be negative.

Mathcounts24 Feb 15, 2019