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
Promoted
When expanding a binomial, how do you know when the signs alternate between the different terms?
For instance if you have (x-y)^15, how do you know when the sign is positive or negative?
Like the first terms are x^15, 15x^14y, 105x^13y^2....but what sign goes in between them?
1 Answer
Relevance
- Pi R SquaredLv 71 decade agoFavorite Answer
Hi,
The first term will be positive and then the signs alternate, so even-numbered terms are negative, and odd-numbered terms are positive.
I hope that helps!! :-)
Still have questions? Get your answers by asking now.