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Question 230516: I need to find the domain of: 7x^2-2x+12
How do I find the domain, please explain this to me so I know how to solve other problems like it. Please help!
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! Domain means to find ALL VALUES that will be allowed for x. In this case, since there are NO DENOMINATORS and NO RADICALS, there are NO RESTRICTIONS, so the DOMAIN is ALL REAL VALUES OF X.
If you need help Functions, Domain and Range, please see my own website for FREE non-traditional explanations of these very important topics. Do a "Bing" or "Google" search for my last name "Rapalje". Near the top of the search list, find "Rapalje Homepage", and near the top of my Homepage, look for the link "MATH IN LIVING COLOR." Choose "College Algebra", and look in "Chapter 2" for "Functions, Domain, and Range". My own students ALL thought my explanations were a LOT easier than the traditional explanations.
Also, I have TWO videos (they are free!) posted on my website on this topic. To see my videos (of me teaching my classes a few years ago!), from my Homepage, look for "Rapalje Videos in Living Color". Choose either Intermediate Algebra or College Algebra (depending upon your level of expertise!), and look for "Functions, Domain, and Range."
Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus
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