# How do you factor #m^4 - n ^4#?

##### 2 Answers

#### Answer:

#### Explanation:

Remember the

Note that

#### Answer:

#### Explanation:

What we have is a difference of squares. Recall that if we have an expression

This has an expansion of

Let's rewrite our expression as

Since we have a difference of squares, we can rewrite this as

What we have in purple is a sum of squares, which can't be factored with real numbers, but we have another difference of squares in blue.

Factoring this, we get

Hope this helps!