Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
1 Answer
- alwbsokLv 710 years agoFavorite Answer
Think about, when is this *not* true? We know that the absolute value of anything is *at least* 0. The only time when |x^2 - 4| > 0 could not be true is if:
|x^2 - 4| = 0
x^2 - 4 = 0 ... (since the only x such that |x| = 0 is x = 0)
x^2 = 4
x = -2 or 2
If x = -2 or 2, then |x^2 - 4| = 0. Otherwise, |x^2 - 4| > 0, so the answer is all real numbers except -2 or 2. In interval notation:
(-infinity, -2) U (-2, 2) U (2, infinity)
Hope that helps!