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Mathematics 19 Online
OpenStudy (anonymous):

.

OpenStudy (anonymous):

i wanted to know how to do it though but i'll just work backward

OpenStudy (anonymous):

@Loser66

OpenStudy (anonymous):

@Astrophysics

OpenStudy (astrophysics):

You can use the rational zero theorem, where you look at your last term and your first term, so we have \[\frac{ \text{factors of 20} }{ \text{factors of 1} }\]

OpenStudy (astrophysics):

I think that's a pretty easy way to do it :), so list your factors but remember there are positive and negative terms.

OpenStudy (astrophysics):

So since it's a polynomial we can treat the first term as P and last term as Q\[\frac{ P }{ Q } = \frac{ \text{factors of 20} }{ \text{factors of 1} }\] so just a nicer way of putting it.

OpenStudy (astrophysics):

So what are the factors of 20?

OpenStudy (anonymous):

20 and 1, 2 and 10, 4 and 5

oregonduck (oregonduck):

come on human calculator XD

OpenStudy (astrophysics):

Factors of 20 are 1,2,4,5,10,20 so you got that :) now what are the factors of 1

OpenStudy (anonymous):

1

OpenStudy (astrophysics):

But remember it's positive and negative!

OpenStudy (anonymous):

so 1 and 1, -1 and -1

OpenStudy (astrophysics):

So we have \[\frac{ P }{ Q } = \pm \frac{ 1,2,4,5,10,20 }{ 1 } = \pm 1,2,4,5,10,20 \] :)

OpenStudy (astrophysics):

Easy peasy right?

OpenStudy (anonymous):

yup. Is that positive negative for all of them?

OpenStudy (anonymous):

so the answer is c, right?

OpenStudy (astrophysics):

Yup! This \[\pm \] indicates it has a positive value and negative, and yup that sounds good!

OpenStudy (anonymous):

i fanned you, you are awesome!

OpenStudy (astrophysics):

Haha, thanks! It's always fun to learn with people!

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