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#1 2012-10-21 15:20:41

skylor
Guest

division

(9x^3 - 3x^2 + 13x - 5)/(3x - 1)

I came up with 3x^2 + -.66/3x-1 and was mark wrong.

#2 2012-10-21 15:28:33

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,547

Re: division

Hi;

-.66

Did you mean to have that period there?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#3 2012-10-21 15:35:44

skylor
Guest

Re: division

yes

#4 2012-10-21 15:37:58

skylor
Guest

Re: division

as in - .66 over 3x-1. Aware me how to make it look good? lol

#5 2012-10-21 15:38:05

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,547

Re: division

Have you tried multiplying your answer by the divisor to check your work?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#6 2012-10-21 15:44:55

skylor
Guest

Re: division

I think it was right but I wrote it wrong like 3x^2 + 0x - .66/3x-1 and he just marked it wrong because of that.

#7 2012-10-21 15:48:58

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 84,547

Re: division

Hi;

So you think the answer is:

I am afraid I would mark you wrong too.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#8 2012-10-21 19:44:55

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,311

Re: division

hi skylor

so that -66 should be 13x - 5

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#9 2012-10-22 00:42:24

noelevans
Member
Registered: 2012-07-20
Posts: 236

Re: division

Hi!

You might write the remainder as -2/3.  The quotient is 3x^2 + 13/3.  smile


Writing "pretty" math (two dimensional) is easier to read and grasp than LaTex (one dimensional).
LaTex is like painting on many strips of paper and then stacking them to see what picture they make.

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