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Mathematics 14 Online
OpenStudy (anonymous):

9-6a-24a^2 Do I have to rearrange this?

OpenStudy (anonymous):

It's a factoring question.

OpenStudy (hedgepig):

oh. yeah -(24a^2+6a-9) take out the common factor 3 -3(8a^2+2a-3) so this is a "hard factoring problem"

OpenStudy (hedgepig):

try... 2 and 4 for a, and -3 and 1 for the constant.

OpenStudy (anonymous):

I'm really confused by this. Would appreciate greatly any help. :-)

OpenStudy (hedgepig):

-3(2a-1)(4a+3)

OpenStudy (anonymous):

I'm a bit confused about what you did, hedgepig. Perhaps I need to review your text for a bit. If you could, please do stay. :-)

OpenStudy (anonymous):

Okay, so what is the way to figure out the order?

OpenStudy (hedgepig):

first, you want to factor out the largest constant.

OpenStudy (anonymous):

What comes first? A, AB, or B? This is just in general.

OpenStudy (anonymous):

Is a squared before a?

OpenStudy (hedgepig):

9-6a-24a^2 factor out the largest number you can first.

OpenStudy (anonymous):

Yes, but I guess I just need to know, in general, the rule for how you order things. Because, I have more problems, of course.

OpenStudy (anonymous):

So, it's just, if you wouldn't mind, I'd like to know how to properly order this trinomials.

OpenStudy (anonymous):

It's so important.

OpenStudy (hedgepig):

there are multiple ways to process this, but, we can do that too. Order from highest degree to lowest.

OpenStudy (anonymous):

But I don't what's highest. Is a^2 higher or lower than a?

OpenStudy (hedgepig):

is it? what is the degree of a^2?

OpenStudy (anonymous):

a^2 is a x a, but I don't know whether it would come before or after a.

OpenStudy (anonymous):

If I were to guess, I would say after.

OpenStudy (anonymous):

I would say a exponents, followed by B. I would guess ab would come before B, too.

OpenStudy (hedgepig):

from what I gather you're missing knowledge from polynomials and terminology. Do you what the degree of a term is?

OpenStudy (anonymous):

Unfortunately, I am not very knowledgeable on the terminology.

OpenStudy (hedgepig):

Ok. You NEED to know this stuff. that being said, it shouldn't be too hard. let's do some examples: 6x^3 23x^5 x^3 8x 9 -5x^2 identify the degree of each term.

OpenStudy (anonymous):

I would guess the degree is the exponent.

OpenStudy (hedgepig):

yes.

OpenStudy (anonymous):

So, degrees are synonymous with exponents?

OpenStudy (hedgepig):

no.

OpenStudy (hedgepig):

what we are referring to is, as far as I can tell, a specific realm - the realm of polynomials.

OpenStudy (hedgepig):

to answer your question, yes, degree is synonymous with exponents in the context of polynomials, but I am not sure I would say x^(-pi) would have degree -pi.

OpenStudy (anonymous):

Okay.

OpenStudy (anonymous):

In the poly and trinomial universe, degrees and exponents are the same thing.

OpenStudy (anonymous):

That's the universe my head is in right now. :P

OpenStudy (hedgepig):

that's not a problem in this context, but I would really advise you think broader than this if you want success mathematically.

OpenStudy (anonymous):

Now, I really do need to know how to order these trinomials, because they're giving them to me out of order. If I can understand how the order works, it should be easy.

OpenStudy (hedgepig):

i already gave you the answer to this - you order them from highest degree to lowest.

OpenStudy (anonymous):

The problem is, I genuinely do not know what the highest degree is. I don't.

OpenStudy (hedgepig):

note that for expression x^4 y^2 z^7 the degree is 4+2+7=13

OpenStudy (hedgepig):

Yes. That is, again, why i told you to identify the degree of each term.

OpenStudy (hedgepig):

6x^3 23x^5 x^3 8x 9 -5x^2

OpenStudy (anonymous):

9-6a-24a^2

OpenStudy (anonymous):

So, 24a^2 is first

OpenStudy (hedgepig):

of what degree? and you forgot a minus sign.

OpenStudy (anonymous):

The other two don't have a degree, though.

OpenStudy (anonymous):

Yes, my bad.

OpenStudy (hedgepig):

I don't understand why you keep ignoring me. Identify the degree of each term 6x^3 23x^5 x^3 8x 9 -5x^2

OpenStudy (anonymous):

The degree is the 2.

OpenStudy (anonymous):

I'm sorry, I'm not trying to ignore you.

OpenStudy (hedgepig):

The degree isn't the 2 in that case. The degree IS 2.

OpenStudy (hedgepig):

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