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  #1  
Old 06-13-2008, 03:11 AM
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odepaj odepaj is offline
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Need some help!

Ok, so im at a friends house and he gives me an equation to see if I can figure it out, as he is having trouble with it.....

1/x2(squared)+2/x-8=0

I figured it to x=.5 but my math is rusty......

Any help? It's really bothering me! I want to know if I got it right or not.




Dustin
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  #2  
Old 06-13-2008, 04:58 AM
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Re: Need some help!

Quote:
Originally Posted by odepaj View Post
Ok, so im at a friends house and he gives me an equation to see if I can figure it out, as he is having trouble with it.....

1/x2(squared)+2/x-8=0

I figured it to x=.5 but my math is rusty......

Any help? It's really bothering me! I want to know if I got it right or not.

Dustin

wait... is it (1/X2)² + (2/X) – 8 = 0 ??
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  #3  
Old 06-13-2008, 01:11 PM
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Re: Need some help!

Quote:
Originally Posted by SilverSpear View Post
wait... is it (1/X2)² + (2/X) – 8 = 0 ??
no, sorry about that

1/ "x^2"
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1992 Ebony LS-L w/191k miles Mods: a few and acouple more

1995 Brilliant Red L/AWD w/154k miles Mods: Stebro catback exhaust, K&N drop in filter, ECUtune ST1v5, 4.44, lots of JDM goodies

1992 Pearly LS-L w/154k miles Sold Mods: 4.11, rust

2008 DGM Legacy spec.B w/245k miles Mods: Cryotune Stage3, VF52, bushings galore, STi pink springs, Bilstein HDs


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  #4  
Old 06-13-2008, 02:11 PM
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Re: Need some help!

Quote:
Originally Posted by odepaj View Post
1/x2(squared)+2/x-8=0
(1/(x^2)) + (2/x) - 8 = 0

Multiply all by (x^2)

1 + 2x - 8(x^2) = 0

Negate both sides

-1 - 2x + 8(x^2) = 0

Reorder

8(x^2) - 2x - 1 = 0

"Undo"

(4x + 1) * (2x - 1) = 0

Two answers:

(4x + 1) = 0 -> x = -1/4
(2x - 1) = 0 -> x = 1/2

Is it sad that I fell into this trap?
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  #5  
Old 06-13-2008, 05:59 PM
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Re: Need some help!

You're light years ahead of me and I need to get this out of my head so I can do my first tranny removal.
Gene
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