On a computer, you can type the square of a number (let's say x) as x^2. For example, five squared is typed as 5^2.
121 is a square number
It is an irrational number.
The square root of 16 is ±4 which is the rational number ±(4/1)
It is an irrational number, which is a kind of real number.
irrational
A perfect square.
121 is a square number
The square root of 40 is an irrational number
A square number, because its square root is paired with itself.
A square number.
A perfect square.
A perfect square.
It is an irrational number
A square number.
It is an irrational number.
It is an imaginary number
The square root of 16 is ±4 which is the rational number ±(4/1)