Partial fraction expansion (polynomial division)

  • Thread starter seang
  • Start date
  • #1
seang
184
0
If we're asked to expand an irrational partial fraction, we need to rationalize it first, right? I've forgotten (well not totally) how to perform polynomial division. Here are a few examples:

1. (1000x +1000000)/(.4x + 200).

For this one I got 50000.


2. (500x + 60000)/(x+100).

For this one I got 600, is that right?

It doesn't feel like I'm doing them correctly, if my answers are wrong can somebody walk me through them?
 

Answers and Replies

  • #2
vaishakh
335
0
This is fit enough even to be posted in a column even below the pre-calculus one.
Just a zer is extra in 1st and you are wrong in 2nd. Don't post such silly things anymore.
 
  • #3
VietDao29
Homework Helper
1,426
3
vaishakh said:
This is fit enough even to be posted in a column even below the pre-calculus one.
Just a zer is extra in 1st and you are wrong in 2nd. Don't post such silly things anymore.
???
Huh??? What??? What kind of help is THAT??? Are you threatening the OP not to post what he's not very sure about????
Please note that, IF you do not feel like answering the OP's question, DO NOT bother to answer it. Let someone else do it for YOU!!!!!!!! :grumpy: :grumpy: :grumpy:
seang, you may want to have a look at this page.
I'll give you an example.
---------------------
Example:
[tex]\frac{2x + 5}{x + 3}[/tex]
Now first, divide 2x by x to get 2. Then multiply the divisor (i.e x + 3) by the result you just obtained (i.e 2), you will get 2x + 6.
Subtract (2x + 6) from (2x + 5) to get -1.
-1 is of the degree 0, while x + 3 is of the degree 1, and 0 < 1. Hence, -1 is the remainder, and we can stop here.
So the answer is:
[tex]\frac{2x + 5}{x + 3} = 2 - \frac{1}{x + 3}[/tex]
Can you go from here? :)
 

Suggested for: Partial fraction expansion (polynomial division)

Replies
8
Views
334
  • Last Post
Replies
4
Views
385
Replies
9
Views
382
Replies
4
Views
319
Replies
3
Views
253
Replies
10
Views
326
  • Last Post
Replies
16
Views
900
  • Last Post
Replies
13
Views
983
  • Last Post
Replies
12
Views
366
Top