Homework Help: Quadratic Long Division question?

Posted by Goldfish on Wednesday, February 10, 2010 at 5:34am.

How do i do this using long division? This is part of a Partial Fractions Question. Please help, thanks!

(x^3) / (x^3 - 2x^2 + 3x - 18)
I tried using long division, but I could only get a quotient of 1, and a remainder of 2x^2 - 3x + 18

Did i do something wrong?

Quadratic Long Division (sos Reiny!) - drwls, Wednesday, February 10, 2010 at 6:01am
One does not use polynomial long division to apply the method of partial fractions. Try factoring x^3 - 2x^2 + 3x - 18 instead. The factors are (x-3)and (x^2 +x -6).

The next step is, I believe to express your ratio in terms of
C/(x-3) + (Ax + B)/(x^2 +x -6).

where A, B and C are constants. There should be three values that work.
Quadratic Long Division (error) - drwls, Wednesday, February 10, 2010 at 6:05am
Change (x^2 +x -6) to (x^2 +x +6)
Quadratic Long Division question? - john, Monday, July 11, 2011 at 12:32pm
6

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