I have a problem where I got the final answer:(adsbygoogle = window.adsbygoogle || []).push({});

Code (Text):

1 1

- --------- - --------

(u - 1)^2 (u + 1)^2

which is correct, but the book further simplifies it to:

I tried and tried, but couldn't figure out how to simplify it to that result. Can someone please explain the process to me?Code (Text):

2(1 + u^2)

- -------------

(u^2 - 1)^2

Thanks!

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# Math simplify problem

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