Math Is Fun Forum
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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
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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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
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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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
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#8 2012-10-21 19:44:55
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,648
Re: division
hi skylor
so that -66 should be 13x - 5
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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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.
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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