Functions: Domain of an ellipse? Help!!!?

Lal La La La La

New member
How do I find the domain of an ellipse?
Photo of problem: http://i54.tinypic.com/21obk7n.jpg

The answer should be:

Domain = (-?, +?)

right? My teacher didn't ask for the range of it, but if she had, I think it would be the same answer, right?


It's probably wrong--it's only been my first day of Algebra II.
 
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