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Mathematics 12 Online
OpenStudy (anonymous):

3/x-4+2/x+4=14/(x+4)(x-4)

OpenStudy (anonymous):

well first thing is first.. your gonna wanna multiply both sides by (x+4)(x-4)

OpenStudy (anonymous):

why you ask? well think about what happens when you do that. what disappears?

OpenStudy (anonymous):

(x+4)(x-4) disappear

OpenStudy (anonymous):

right, the (x+4)(x-4) disappears on the Denominator. now lets first look at the left hnd side of the equation. Multiply both 3/(x-4) and 2/(x+4)by that

OpenStudy (anonymous):

whats that give you?

OpenStudy (anonymous):

i have to find the value of x

OpenStudy (anonymous):

I am aware of this. we are getting there

OpenStudy (anonymous):

9

OpenStudy (anonymous):

let me check the answer real quick i actually didnt work it out..

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

eh not what im getting

OpenStudy (anonymous):

what is 3/(x-4) * (x-4)*(x+4)

OpenStudy (anonymous):

o

OpenStudy (anonymous):

and what is 2/(x+4)*(x+4)(x-4)

OpenStudy (anonymous):

eh no not 0...

OpenStudy (anonymous):

i dont know it

OpenStudy (anonymous):

if you have something like x/x that gives you the numerical value of 1. why? because think about it - its saying hey look i have x items to choose from and i have to divide it out in x number of ways.

OpenStudy (anonymous):

im not gonna just give you an answer. I dont believe in just giving out answers and letting people skim by their courses... its bullpellet

OpenStudy (anonymous):

gonna make sure you understand it first

OpenStudy (anonymous):

no i want you to explain it to me

OpenStudy (anonymous):

hmm ok. this isnt going to cut it i have a neat program to show you how it works... http://www.scriblink.com/index.jsp?act=phome&roomid=374&KEY=F9379C0246105A3314E20F1DB1DC4206

OpenStudy (anonymous):

its an online whiteboard hopefully your internet connection is good enough to handle it

OpenStudy (anonymous):

it dont work

OpenStudy (anonymous):

ok im on it now

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