Question

Help!! Im a little stuck.. I need to decompose this into partial fractions:

Answer 1

\[(2x^2-11x+5)/(x-3)(x^2+x-4)\]

Answer 2

What course are you currently taking?

Answer 3

This is Pre-Calc Hero

Answer 4

Okay, just wondering.

Answer 5

Then I use A/(x-3)+B(x^2+x-4)

Answer 6

What textbook are you using for the course?

Answer 7

Precalculus: Graphs and Models by Addison Wesley

Answer 8

Thanks

Answer 9

Its pretty old. 1997

Answer 10

That's okay. Sometimes, old is better.

Answer 11

Okay. I mean its probably all the same techniques, for the most part.

Answer 12

What edition?

Answer 13

Well, nevermind. I'll get get the latest edition.

Answer 14

Ok I wasnt sure. I dont know if it says it for sure.

Answer 15

If you have the book, it will say what edition it is. You just have to look, but okay.

Answer 16

I have about 9 min left before it finishes downloading

Answer 17

I really dont see it at all :O This is the exact book though http://www.abebooks.com/book-search/isbn/0201694425/hard-cover/

Answer 18

Ok thats fine. Thanks

Answer 19

If you want to show someone a book, use amazon.com

Answer 20

ahh alright.

Answer 21

Yes, that version is very old. It's not even available for download. It's the first edition apparently

Answer 22

4 minutes left..

Answer 23

ok

Answer 24

If you have the book, is there any reason why you are not able to understand this concept?

Answer 25

I get the concepts down sort of, I just end up with the wrong numbers. I either do a step too early or Im not doing it completely right. I just want to make sure I understand it

Answer 26

Okay, I will have a look here in about 15 secs

Answer 27

Ok Ill go through with what Im doing and you can maybe see what Im doing wrong

Answer 28

Let me know when its done

Answer 29

It might take me a bit to figure this out.

Answer 30

Ok thats fine!

Answer 31

Okay, I see something similar to this where it talks about setting up a decomposition template.

Answer 32

Its in a lesson called Partial Fractions in my book

Answer 33

That sounds right though

Answer 34

\[\frac{2x^2 - 11x+5}{(x-3)(x^2+x-4)} = \frac{A}{x-3} + \frac{Bx + C}{x^2 + x -4}\]

Answer 35

Maybe that's what you're looking for.

Answer 36

So then its \[A(x^2+x-4)+(x-3)(Bx+C)=2x^2-11x+5\]

Answer 37

What I posted is in your book so it is correct. If what you posted is the next step, then by all means, go right ahead, but maybe someone else can take a look at that for you.

Answer 38

Ok thats cool. I needed that for sure so thanks a lot Hero