x -1
┌───────────
x^2-2x+1│x^3 -3x^2 -x -1
x^3 -2x^2 +x
----------------------
-x^2 -2x -1
-x^2 +2x -1
------------------
-4x
商式:x-1 余式:-4x.
x -1
┌───────────
x^2-2x+1│x^3 -3x^2 -x -1
x^3 -2x^2 +x
----------------------
-x^2 -2x -1
-x^2 +2x -1
------------------
-4x
商式:x-1 余式:-4x.