polynomial division and remainder theorem

Hi;

use remainder theorem to find the remainder of (3x^4 - 5x^2 - 20x -8) / (x + 1).


When using remainder theorem I get remainder -33

and with long division I get remainder 10 which I think is the right answer.

Not sure why I'm getting -33 with remainder theorem
What am I missing?


Thanks.

The correct answer is 10. Post your working.

...

Code:

---

-1] ... 3 ... 0 ... -5 ... -20 ... -8

.............-3 ....3.......2 ... 18
---------------------------------------

.......3.....-3....-2.....-18 ... 10

---

Quote:

---

Originally Posted by anthonye

Hi;

use remainder theorem to find the remainder of (3x^4 - 5x^2 - 20x -8) / (x + 1).


When using remainder theorem I get remainder -33

and with long division I get remainder 10 which I think is the right answer.

Not sure why I'm getting -33 with remainder theorem
What am I missing?


Thanks.

---

Using the remainder theorem,

Yeah I got it thank you.