When the square root of a number is a whole number, this number is called a perfect square. ... Many square roots are irrational numbers, meaning there is no rational number equivalent.

Are square roots rational or irrational?

Sal proves that the square root of any prime number must be an irrational number. For example, because of this proof we can quickly determine that √3, √5, √7, or √11 are irrational numbers.

Is the square root of 2 rational or irrational?

Sal proves that the square root of 2 is an irrational number, i.e. it cannot be given as the ratio of two integers.