According to Wikipedia, an algebraic number is any complex number (including real numbers) that is a root of a non-zero polynomial in one variable with rational coefficients.
The polynomial has many roots, how do I know which of the roots does the algebraic number denotes?
Is this where e.g. "isolating interval representation" comes in, that is, I need to somehow bound which root I'm interested in? What other ways there are to identify a given root?
As you could surely tell, I'm very new to this kind of math...