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Question 596537: what is the domain of x squared + 3x
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! In this expression x^2 + 3x, since there are no denominators and no square roots, there are NO RESTRICTIONS on x. The domain is all real numbers.
For additional explanation on FUNCTIONS, DOMAIN, and RANGE, please see my own website. The easiest way to find it is to use the easy to spell and easy to remember link www.mathinlivingcolor.com. On this single page website, there is a link at the bottom of the page that takes you to my Homepage. Near the top of my homepage, look for the link "Basic, Intermediate, and College Algebra: One Step at a Time", and choose either Intemediate Algebra (Chapter 5), or College Algebra (Chapter 2). There you will find explanations that may be easier to understand than your traditional textbooks, and many of the exercises from these sections are solved in color on the "MATH IN LIVING COLOR" pages that go with these sections. There are also VIDEOS of me teaching this topic a few years before I retired. These videos are FREE, and you can see them by looking on my Homepage for the link "Rapalje Videos in Living Color."
If you like my website, please tell your friends and family. It's all FREE. You can contact me by Email at rapaljer@seminolestate.edu.
Dr. Robert J. Rapalje, Retired
Professor of Mathematics
Seminole State College of Florida
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