Synthetic and Long Division for (9x^4 - x^2 - 6x + 2) / (3x - 1)

[flyingpig]

Homework Statement

I apologise that this is not in LaTeX, but i just couldn't find the codes

Use long division or synthetic division: (9x^4 -x^2 - 6x+2) / (3x-1)

The Attempt at a Solution

So the root is x = 1/3

P(1/3) = 0, no remaindar

1/3 | 9 0 -1 -6 2
...|...3 -1 0 -2
___________
...9 -3 0 - 6 4

Where did i go wrong?

 

[ehild]

What do you do really? If I guess well, the second line should be
3 -1 -6 2.

ehild

 

[SammyS]

You should ADD items in the first and second lines.

Don't forget to divide the result by 3.

 

[flyingpig]

Sammy, why did you leave the physics forum? Come back!

 

[SammyS]

Gee, I think I'm still there --- or am I here ??

BTW: I've posted a couple of times in a recent Gauss's Law thread of yours.

 

[flyingpig]

Gee, I think I'm still there --- or am I here ??

BTW: I've posted a couple of times in a recent Gauss's Law thread of yours.

If you are talking about this one https://www.physicsforums.com/showthread.php?t=489350&page=9, I think eveyrone gave up on it already lol. Oh yeah yuo mean my new problem.

 

[HallsofIvy]

The problem was to divide $9x^4- x^2- 6x+ 2$ by 3x- 1. Your synthetic division is dividing by x- 1/3. That's why SammyS says you need to also divide by 3.