anonymous
  • anonymous
Simplify the following. (2x/(x^2-6x+9)) - (1/(x+1)) - (8/(x^2-2x-3))
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
(2 x)/(x^2-6 x+9)-8/(x^2-2 x-3)-1/(x+1) Maybe that will help =)
anonymous
  • anonymous
I'm so lost... Could you explain a little more? I knew this last year but I've forgotten over the summer. -_-
anonymous
  • anonymous
It looks like this if this helps: \[\frac{ 2x }{ x^2-6x+9} - \frac{ 1 }{ x+1 } - \frac{ 8 }{ x^2-2x-3 }\]

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anonymous
  • anonymous
ok so wouldn't you cross divide any similar factors like|dw:1378251111107:dw|
anonymous
  • anonymous
..... at least that's what I think
anonymous
  • anonymous
you can't do that... the crossing out thing only works if you have factors on the top and the bottom. It still has substraction symbols outside of actual factors.
anonymous
  • anonymous
huh.... wait i don't get it 2x goes into 6x 3 times so why wouldn't it be 3x? sorry i feel like i'm confusing you not helping you.....
anonymous
  • anonymous
No, it's okay. The reason you can't do that is because you can't pick and choose from the polynomial what you want to simplify. You have to factor the top and the bottom first to do that. For instance, \[\frac{ x^2+4x+3 }{ x^2+2x+1 }\]\[\frac{ (x+3)(x+1) }{ (x+2)(x+1) }\] I can't suddenly cancel the 4 and make it a two and make the 2 on the bottom a 1. It doesn't work. I have to factor both things first because in order to divide I need numbers that multiply, like this: \[\frac{ (x+3)(x+1) }{ (x+2)(x+1) }\] Now you can cancel the two (x+1) 's because they are multiplying the stuff around them, not subtracting or adding.
anonymous
  • anonymous
But seriously, I really need help on this one. It's driving me crazy.
anonymous
  • anonymous
I get it!.... but didn't you kinda solve the question you have? :)
anonymous
  • anonymous
I wish.... :/
anonymous
  • anonymous
lol give me a minute... let's try this again shall we? :)
anonymous
  • anonymous
All right... it's just that I know there was a technique I learned but I don't remember anything!
anonymous
  • anonymous
Plus, I bumped the question and it's not going to the top. -_-
anonymous
  • anonymous
it's fine i hate when that happens though it's like i know it i know it i know it.... I DON'T KNOW IT... and i know the first time i had a question and tried to bump it up top it wouldn't work and i was like greattttttt..... LOL :)
anonymous
  • anonymous
ok so i'm not sure if i did this right but here goes|dw:1378252649721:dw| so the end result would be x-8/-8+6........ what do you think?
anonymous
  • anonymous
i did 1/1 cancel out so that didn't matter then i did 2x-x up top and got x-8 then for the bottom i did x^2-x^2=0 so that canceled out and that left me with -6x-2x and 9-3 so that's how i got the answer...... does that work?
anonymous
  • anonymous
It's not right. Thanks for trying though.
anonymous
  • anonymous
oh ok sorry.... :( good luck though :)
anonymous
  • anonymous
i would recommend you ask DebbieG they might be able to help you

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