partial fraction decomposition: denoms, using A+B+C method

Complex numbers, rational functions, logarithms, sequences and series, matrix operations, etc.
c4jester
Posts: 2
Joined: Mon Mar 12, 2012 4:49 pm
Contact:

partial fraction decomposition: denoms, using A+B+C method

Postby c4jester » Mon Mar 12, 2012 4:57 pm

I am lost on a couple problems, can anyone help. We are working on Partial Fraction Decomposition, and these are two problems I am stuck on.

Problem 1
x^2-2x / x^4+x^3+16x^2+9x+63

Problem 2
2 / x^4+4x^3+11x^2-3x+9

we were working on breaking down the denom, and using the A+B+C method to solve. Any help would be great.

User avatar
stapel_eliz
Posts: 1733
Joined: Mon Dec 08, 2008 4:22 pm
Contact:

Postby stapel_eliz » Mon Mar 12, 2012 6:49 pm

c4jester wrote:we were working on breaking down the denom...

Does the above mean that you're factoring the denominators, or does it mean something else?

c4jester wrote:...and using the A+B+C method to solve.

What is "the A+B+C method"? What equations are you solving? Or are you supposed to be decomposing the fractions?

Thank you! :wink:

c4jester
Posts: 2
Joined: Mon Mar 12, 2012 4:49 pm
Contact:

Re: partial fraction decomposition: denoms, using A+B+C meth

Postby c4jester » Mon Mar 12, 2012 7:53 pm

Yes, factoring the denominator end result is decomposition of the fraction. We are finding the LCM and then break apart the numerator.

Hopfully that helps your understanding better than mine.. lol

Thanks

User avatar
stapel_eliz
Posts: 1733
Joined: Mon Dec 08, 2008 4:22 pm
Contact:

Postby stapel_eliz » Tue Mar 13, 2012 12:37 am

To learn how to factor polynomials, please try here.

To learn how to use partial-fraction decomposition, please try here.

:wink:

anonmeans
Posts: 64
Joined: Sat Jan 24, 2009 7:18 pm
Contact:

Re: partial fraction decomposition: denoms, using A+B+C meth

Postby anonmeans » Tue Mar 13, 2012 7:16 pm

c4jester wrote:Problem 1
x^2-2x / x^4+x^3+16x^2+9x+63

Problem 2
2 / x^4+4x^3+11x^2-3x+9

Are you sure these are right? 'Cos I don't think these denominators factor.


Return to “Advanced Algebra ("pre-calculus")”