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Math Help - Question: Quadratic Formula

  1. #1
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    Question Question: Quadratic Formula

    I keep making some type of mistake on this problem, can someone please show how to work it out? I think maybe I get the signs mixed up. I am supposed to work it using the quadratic formula.

    s^2 = 9 + s(1-2s)

    Thanks!!
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  2. #2
    Master Of Puppets
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    s^2 = 9 + s(1-2s)

    s^2 = 9 + s-2s^2

    3s^2 -s- 9 =0

     <br />
s = \frac{-(-1)\pm\sqrt{(-1)^2-4\times 3 \times -9}}{2\times 3}=\dots<br />

    can you finish it?
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  3. #3
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    Talking Now I get it

    I wasn't distributing the s before using the quadratic formula. Thanks so much!!
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