Multiply or divide show your 3n^2-3 over n^2-1 divided by n^2 over n+1 show your !

Here, 3n² - 3 / n² - 1  * (n + 1) / n²
= 3(n² - 1) / (n² - 1) * (n + 1) / n²
= 3(n + 1) / n²
= 3n + 3 / n²

In short, Your Answer would be: (3n + 3) / n²

Hope this helps!