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Mathematics 20 Online
OpenStudy (anonymous):

What are the possible number of positive real, negative real, and complex zeros of f(x) = 4x3 + x2 + 10x – 14? Please hellllpppp

OpenStudy (anonymous):

Anyone????

OpenStudy (anonymous):

Well, we know it's 3 in total...

OpenStudy (anonymous):

So then the only question is whther it has complex roots which come in pairs...

OpenStudy (anonymous):

Well how would we use Descrates' Rule of Signs with this

OpenStudy (anonymous):

Sign changes..?

OpenStudy (anonymous):

Well what are the complex and real numbers?

OpenStudy (anonymous):

Let's see, one sign change at the end there...

OpenStudy (anonymous):

So that supposedly means it has one positive root.. Nice if we knew what it was...

OpenStudy (anonymous):

Rational roots theorem, see if we can spot one...?

OpenStudy (anonymous):

Okay, well I don't know I'm really confused :/

OpenStudy (anonymous):

Hmm.. no go, it's near to 1 though... Which would make the other 2 complex.

OpenStudy (anonymous):

I'll go with that, 1 positive, 2 complex...

OpenStudy (anonymous):

Is that the final answer?

OpenStudy (anonymous):

Sorry can you just explain that to me?

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