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P.nut1996

Help me solve? I'm not even sure where to begin... x^2+5x+3=0

  • one year ago
  • one year ago

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  1. P.nut1996
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    \[x ^{2}+5x+3=0\]

    • one year ago
  2. phi
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    It looks like you need to use the quadratic formula http://www.purplemath.com/modules/quadform.htm or use "completing the square"

    • one year ago
  3. phi
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    Have you learned either of these ?

    • one year ago
  4. P.nut1996
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    Yes but I have not used them in a while...

    • one year ago
  5. phi
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    this video shows how http://www.khanacademy.org/math/algebra/quadratics/quadratic_formula/v/using-the-quadratic-formula

    • one year ago
  6. phi
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    if you more problems like this, I would watch the video, because once you learn it, the problems go quickly.

    • one year ago
  7. P.nut1996
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    I have watched that video before.

    • one year ago
  8. phi
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    ok, can you say what is a, b, and c in x^2+5x+3=0

    • one year ago
  9. phi
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    if you don't know, watch the first 3 minutes again.

    • one year ago
  10. P.nut1996
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    \[a=x^2, b=5x, c=3\]

    • one year ago
  11. phi
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    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

    • one year ago
  12. P.nut1996
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    \[1+5+3=0??\]

    • one year ago
  13. Luis_Rivera
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    • one year ago
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  14. P.nut1996
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    Oh, you are a life saver! Thank you so much :)

    • one year ago
  15. Luis_Rivera
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    kk

    • one year ago
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