anonymous
  • anonymous
Help me solve? I'm not even sure where to begin... x^2+5x+3=0
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
\[x ^{2}+5x+3=0\]
phi
  • phi
It looks like you need to use the quadratic formula http://www.purplemath.com/modules/quadform.htm or use "completing the square"
phi
  • phi
Have you learned either of these ?

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anonymous
  • anonymous
Yes but I have not used them in a while...
phi
  • phi
this video shows how http://www.khanacademy.org/math/algebra/quadratics/quadratic_formula/v/using-the-quadratic-formula
phi
  • phi
if you more problems like this, I would watch the video, because once you learn it, the problems go quickly.
anonymous
  • anonymous
I have watched that video before.
phi
  • phi
ok, can you say what is a, b, and c in x^2+5x+3=0
phi
  • phi
if you don't know, watch the first 3 minutes again.
anonymous
  • anonymous
\[a=x^2, b=5x, c=3\]
phi
  • phi
close, but a , b and c are only the numbers, not the letters a=1 (the number in front of x^2 is 1 if you don't see a number) b=5 c=3
anonymous
  • anonymous
\[1+5+3=0??\]
anonymous
  • anonymous
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anonymous
  • anonymous
Oh, you are a life saver! Thank you so much :)
anonymous
  • anonymous
kk

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