多項式除多項式 help~~~~~~~~~~~~~~~~

2011-05-19 5:59 am
1. (x三次方-3x+x二次方-8)÷(z-2)

2. (3x三次方-4x-5x二次方+3)÷(x二次方-x+5)

回答 (2)

2011-05-19 7:38 am
✔ 最佳答案
1. (x^3-3x+x^2-8)/(x-2)
Sol
(x^3+x^2-3x-8)/(x-2)

1 1 -3 -8|
  2  6  6|2
───────────
1 3  3|-2
(x^3+x^2-3x-8)/(x-2)
=x^2+3x+3.....-2

2. (3x^3-4x-5x^2+3)/(x^2-x+5)
Sol
(3x^3-5x^2-4x2+3)/(x^2-x+5)
x^2-x+5=0
x^2=x-5

3 -5  -4  3|
   3  -2   |1
     -15 10|-5
──────────────
3 -2|-21 13
(3x^3-5x^2-4x2+3)/(x^2-x+5)
=3x-2....-21x+13


2011-05-19 6:51 am
1. (x³-3x+x²-8)÷(z-2) <~打錯?!


收錄日期: 2021-04-23 20:45:35
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