A perfect square is a number that can be expressed as the* product of two equal integers*.

**Examples** of perfect squares

- 9
- 9 is a perfect square because it can be expressed as 3 * 3 (the product of two equal integers)

- 16
- 16 is a perfect square because it can be expressed as 4 * 4 (the product of two equal integers)

- 25
- 25 is a perfect square because it can be expressed as 5 * 5 (the product of two equal integers)

__Non__ examples of perfect squares

__Non__

- 8
- 8 is a
**not**perfect square because you cannot express it as the product of two equal integers

- 8 is a
- 5
- 5 is a
**not**perfect square because it cannot be expressed as the product of two equal integers

- 5 is a
- 7
- 7 is a
**not**perfect square because you cannot express it as the product of two equal integers

- 7 is a