Horner geht wohl nur mit linearem Divisor.
Aber Polynomdivision:
(2x5 - 4x3 + 3x + 1) : (x2 + 2) = 2x3 - 8x
2x5 +4x3
----------------
-8x3 + 3x + 1
-8x3 -16x
-----------------------------
19x + 1
Also (2x5 - 4x3 + 3x + 1) : (x2 + 2) = 2x3 - 8x + (19x+1) / ( x2 + 3 )