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P.nut1996

  • 3 years ago

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

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

  2. phi
    • 3 years ago
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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"

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

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

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

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

  7. P.nut1996
    • 3 years ago
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    I have watched that video before.

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

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

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

  11. phi
    • 3 years ago
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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

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

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

  15. Luis_Rivera
    • 3 years ago
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    kk

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