# Question #62fe0

##### 3 Answers

#### Explanation:

First, we can bring out a

Next we realize that

This means we can factor our expression like so:

#### Explanation:

First, we know that

Therefore, factor out the common term

Then, we rewrite

We will remove

We will then apply the DOS (Difference of squares) rule:

Therefore,

Put back the

#### Explanation:

It seems like there's nothing to be done here about the

There's an identity for a difference of squares:

On such problems, if "factoring out numbers" doesn't seem to work, maybe you'll have to use one of those.