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 MATHS!

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MonkZheng

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Number of posts : 362
Age : 24
Localisation : Australia, NSW, Narara
Registration date : 2006-02-11

PostSubject: MATHS!   Wed 27 Sep - 17:02

i need help on my maths homework....


>2 means squared

factorise=

x>2 - 4 / x>2 - x - 6
________ _________
x>2-7x+10 x>2 - 3x+1-
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vigetto

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PostSubject: Re: MATHS!   Wed 27 Sep - 17:13

Umm.....3?
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MonkZheng

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PostSubject: Re: MATHS!   Wed 27 Sep - 17:14

NO!
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MonkZheng

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PostSubject: Re: MATHS!   Wed 27 Sep - 17:14

show your working out, so u cant cheat
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Ranka
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Number of posts : 99
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Registration date : 2006-04-21

PostSubject: Re: MATHS!   Thu 28 Sep - 5:50

hell if i understand what you wrote, are those 2 fractions? and 1- at the end? 1 minus what? Evil or Very Mad
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Osa-Anna

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PostSubject: Re: MATHS!   Thu 28 Sep - 6:16

I am not even sure if this would be right ..... I didn't really know what you worte down xD but here is what happened to me Razz



x>2-4/x>2-x-6
------------------- =
x>2-7x+10x>2-3x+1

-x+0.67
----------------- = 11x>2+10+0.67
11x>2-10x+1

xD Oh I just did this for fun even if you didn't need it or anything .... sadly I love math ._.

Its probably worng anyways xD
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sheildsgalore
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Localisation : in the 18-D hyperspace of my mindscape, good luck finding me!
Registration date : 2006-03-23

PostSubject: Re: MATHS!   Thu 28 Sep - 7:57

MonkZheng wrote:
i need help on my maths homework....


>2 means squared

factorise=

x>2 - 4 / x>2 - x - 6
________ _________
x>2-7x+10 x>2 - 3x+1-

now that i see this under the quote image(which you can't see unless you qoute his)... there are two fractions.. and from what i am gonna assume, these two fractions are being divided..

x>2 -4
________
x>2-7x+10

thats fraction one

x>2 - x - 6
_________
x>2 - 3x +1 (assuming the "-" is a typo as well..)

thus... its a division problem, so flip the secon equation to:

x>2 -3x + 1
__________
x>2 - x - 6

then it becomes a multiplication problem with fractions..

x>2 -4 x>2 -3x +1
________ * ___________
x>2-7x+10 x>2 - x - 6

so.. we need to make the bottom equations match, but first, lets factor these out into simpler bits..hmmmm the tops can be factoed as well..

fraction 1:

x>2 - 4 = (x+2)(x-2)
x>2 - 7x + 10 = (x-5)(x-2)

fraction 2:

*top can't be factored*
x>2 - x -6 = (x+2)(x-3)

so.. the new eqautions would be:

(x+2)(x-2) x>2 -3x +1
_________ * ____________
(x-5)(x-2) (x+2)(x-3)

so much simpler now.. now we cross similar factors out....

1 x>2 -3x +1
__________ * ___________
(x-5) (x-3)


now lets multiply:
x-5)(x-3) = x>2 -3x -5x +15 = x>2 - 8x+15

x>2 -3x + 1
____________
x>2 - 8x+15

this is the answer i came up with.. i will now re read making sure i didn't mistype anythign screwing myself up





EDIT: view under the quote option, this forum does NOT handle multiple spaces thus squishing my equations together!


EDIT2: if he typod the bottom right of his starting eqation, and meant x>2 - 2x +1 then it could be factored cleanly.. secondly i could also make use of the quadratic eqaution, but doing that in the computer would be difficult, and the asnwers wouldn't come out clean either...

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crowl

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PostSubject: Re: MATHS!   Thu 28 Sep - 10:51

shit i cant even read that lol!
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sheildsgalore
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PostSubject: Re: MATHS!   Thu 28 Sep - 10:57

as i said in one of the dit foot notes.. i said it would be easier to read if you look at the quote *meaning click on the quote button*

if you can't read it after that.. TAKE MORE MATH!

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crowl

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PostSubject: Re: MATHS!   Thu 28 Sep - 11:08

study muhum aha ooh study

i need to stop sleeping in math class lol!
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shumdude

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PostSubject: Re: MATHS!   Thu 28 Sep - 20:48

Mr. Shields...I dont understand!! Can u repeat it in a more simple equation?
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