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Mathematics 20 Online
OpenStudy (magbak):

I will award medal!!!!!! PLEASE HELP !!!!!! Using complete sentences, explain how the outcome of the Rational Root Theorem and Descartes’ Rule of Signs differ from one another. (2 points)

OpenStudy (magbak):

@whpalmer4 @jim_thompson5910 @satellite73

OpenStudy (whpalmer4):

I can't help but think that you must have some course materials that touch on this :-) I'm happy to explain them to you if there's an issue with understanding them, but you really need to have a grasp of them yourself, or you shouldn't go on until you do.

OpenStudy (magbak):

I will but I have no teacher to explain or answer my questions

jimthompson5910 (jim_thompson5910):

the rational root theorem allows you to list all the possible rational roots

OpenStudy (magbak):

That shirt was cool.

jimthompson5910 (jim_thompson5910):

Descartes’ Rule of Signs allows you to count how many possible a) positive real roots b) negative real roots c) complex roots there are

OpenStudy (whpalmer4):

I'm going to let jim answer so you get a coherent viewpoint. If you still have questions when he's done, tag me again and I'll try to clear them up.

OpenStudy (magbak):

Ok.

jimthompson5910 (jim_thompson5910):

you can go ahead whpalmer4, I'm basically done with what I needed to say

OpenStudy (whpalmer4):

I was just thinking how concise that was, and drawing a blank on what I could possibly add :-)

jimthompson5910 (jim_thompson5910):

you can add more and go into more depth of course (I'm sure there are pages and pages of lessons on both), but I think I got the basics of it

OpenStudy (magbak):

Ok the thing is that I am 14 and honestly I did not understand your voca bulary so in baby language please

OpenStudy (whpalmer4):

If you want an explanation of why the rational root theorem works, we could certainly do that. I'm not sure I'm up to an explanation of why Descartes works, but I can describe how to use it.

OpenStudy (whpalmer4):

"the rational root theorem allows you to list all the possible rational roots" The RRT tells you that if there are any rational roots (and there aren't guaranteed to be any!), they are made up from the factors of the constant term (the number at the end without any variable), and the term with the highest exponent.

OpenStudy (whpalmer4):

Descartes' Rule of Signs helps you analyze the breakdown of the roots, but doesn't give you much assistance in finding out exactly what they are. So, you can find out that you have 1 or 3 positive, real roots, but you're on your own for finding x = .

OpenStudy (magbak):

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OpenStudy (magbak):

Thank you all so so so much

OpenStudy (whpalmer4):

Do you want a brief explanation of how the rational root theorem works? Or how to use Descartes?

OpenStudy (magbak):

No thnk you so much

OpenStudy (whpalmer4):

It's not really part of the answer to your question, but if you don't have a teacher to talk to about it...

OpenStudy (whpalmer4):

Okay, well, you know where to find us :-)

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