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simple basic solving equ.

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simple basic solving equ. [#permalink] New post 12 Feb 2006, 10:37
guys, looks like i am getting pathetic...

i took a power prep today , n it was a disaster got 580 :( . have my GMAT on wednesday... i am not this bad. i screwed up coz of some distractions but i suddenly forgot how to solve a simple equ.

ok can come one help me in solving a equation

x^2+6x+5=0 . with steps pls
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Re: simple basic solving equ. [#permalink] New post 12 Feb 2006, 13:16
razrulz wrote:
guys, looks like i am getting pathetic...

i took a power prep today , n it was a disaster got 580 :( . have my GMAT on wednesday... i am not this bad. i screwed up coz of some distractions but i suddenly forgot how to solve a simple equ.

ok can come one help me in solving a equation

x^2+6x+5=0 . with steps pls


Just relax. The week before the exam is always like that. Just consider it practice for the real thing and you'll be fine.

to solve x^2+6x+5=0 you could go two ways:
1. if you notice this eqn. is of the form x^2+bx+c=0
if you can find two numbers whose sum=b and product =c.
Here the numbers are 1,5
c=1*5 and b=1+5
then x^2+6x+5=0 => (x+1)(x+5)=0
so x=-1, or -5

2. OR you could use the following to find the roots of any quadratic eqn. of the above form
x= (-b +/- sqrt( b^2 - 4ac))/2a

hope it helps!
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 [#permalink] New post 12 Feb 2006, 13:28
thnk believe! i topped my school in math in high school , suddenly the exam fear... i forgot the basics too
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 [#permalink] New post 12 Feb 2006, 22:09
x^2+6x+5=0

can be factoried to give (x-1)(x-5) = 0
So (x-1)=0 or (x-5)=0 ---> x = 1, or x = 5
  [#permalink] 12 Feb 2006, 22:09
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