Subtraction is the

**opposite**of addition, division is the inverse of multiplication, and so on.**Squaring**, which we learned about in a previous lesson (exponents), has an inverse too, called "finding the**square**root." Remember, the**square**of a**number**is that**number**times itself.Regarding this, how do you undo a squared?

Finding the square root of a

**number**is the inverse operation of**squaring**that**number**. Remember, the square of a**number**is that**number**times itself. The perfect squares are the squares of the whole**numbers**. The square root of a**number**, n, written below is the**number**that gives n when multiplied by itself.How do you calculate the square root of a number?

**To start finding a square root via prime factorization, first, try to reduce your number into its perfect square factors.**

- Let's use an example. We want to find the square root of 400 by hand. To begin, we would divide the number into perfect square factors.
- We would write this as: Sqrt(400) = Sqrt(25 × 16)

What is the meaning of square numbers?

In mathematics, a

**square number**or perfect**square**is an integer that is the**square**of an integer; in other words, it is the product of some integer with itself. For example, 9 is a**square number**, since it can be written as 3 × 3.**Square numbers**are non-negative.