- #1
roam
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Homework Statement
The following is a worked example, I circled around the part which I couldn't follow:
http://img15.imageshack.us/img15/161/untitleou.jpg
Homework Equations
The Attempt at a Solution
To begin with, I can't understand why they wrote:
[tex]x-1 = \frac{1}{3}(x^3-x^2+2x-2)-\frac{1}{3}(x+1)(x^2-2x+1)[/tex]
(or [tex]3x-3 = (x^3-x^2+2x-2)-(x+1)(x^2-2x+1)[/tex])
What formula/theorem were they using here? I can't follow what is done here.
P.S. On the top it says [tex]gcd(2x^3+x^2-2x-1, x^3-x^2+2x-2)= x-1[/tex], but it previously said "the last non-zero remainder is a gcd". And when the Euclidean algorithem was applied we found that the last non-zero remainder is 3x-3 NOT x-1.
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