# How do you simplify #sqrt441#?

##### 2 Answers

Apr 11, 2016

#### Explanation:

Using the fact that for

Apr 11, 2016

21

#### Explanation:

*Let's have a look at some of the factors of 441:*

and (among others)

**Recall that a square number is a number multiplied by itself once.**

We can then say that *squared*) is equal to 441. Additionally:

**Again, recall that: **

Therefore, we can rewrite our above problem as:

Therefore: 21.