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
2 Answers
Relevance
- Marley KLv 71 decade agoFavorite Answer
f(a-b) for f(x) means plug (a-b) in for all the x's in the function:
2(a-b)^2 - 3(a-b) - 5
= 2(a^2 -2ab + b^2) - 3a - 3b - 5
= 2a^2 - 3a - 2ab - 3b + b^2 - 5
That's it! Though, you probably don't even need to expand it.
- Any dayLv 61 decade ago
Find f(a-b) for f(x)=2x^2-3x-5?
Substitute (a -b) wherever you find x
f(a -b) = 2 (a -b)^2 -3(a - b) -5
expand it
Still have questions? Get your answers by asking now.