# Math Help - simplify

2. ## Re: simplify

Could you explain where you are running into problems and maybe I can help you get past them. I don't think you learn much if I just do the problem for you.

3. ## Re: simplify

How can i simplify the denominator ?

4. ## Re: simplify

Hint: recall the difference of 2 squares.

$a^2-b^2=(a+b)(a-b)$

Think of the denominator as (a-b)

Think you can take it from here? Think about it for a minute or two and if you still can't get it, let me know.

5. ## Re: simplify

Why have you got brackets in the denoninator?

6. ## Re: simplify

Originally Posted by Wilmer
Why have you got brackets in the denoninator?
Probably just to specify which sign they're going to change first...