What is the square of 12? To me that makes no sense so please help me

The square of a number is the number multiplied by itself.

12 * 12 = 144

But 12 has hno suare root

12 does have a square root: √12 = 3.461016

But that has nothing to do with the square of 12.

Study this site.

http://www.mathsisfun.com/definitions/square-number.html

Thanks

You're welcome.