# How do you order the following from least to greatest #4 4/5, sqrt19, -sqrt5, -21, sqrt5#?

##### 1 Answer

#### Explanation:

Notice that

or

One way to think of this when it comes to the order of these two negatives is that

So

Then

That takes care of the negative numbers, but we still have the three positive numbers.

First notice

and also

Therefore

So we know that

and since

then

So we get