The whole number (integer) multiplied by itself.
Two squared is 2*2=4.
5 squared is 5*5=25.
It can be written as x^2 (to the power of 2) , 'x' being the integer.
It's called 'square' because it's the area you get in a square with a side length of the integer.
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A perfect square is a rational number equal to the square of a whole number.
When the whole number is a perfect square, ie it is a whole number squared.
The square root of 15 is not a whole number.
The square of every positive or negative even whole number is a positive even whole number. The square of every positive or negative odd whole number is a positive odd whole number. There are an infinite number of each kind.
nope! take the square root of 5, 2.236067978... which is not a whole number! hope this helps!