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Math Help - Solve quadratic equation for x

  1. #1
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    Solve quadratic equation for x

    Hi

    I am trying to solve the following equation for x:

    8.64 = -0.0033x2 + 0.2496x + 4.2041

    I'm not exactly sure how to proceed with this. Would I first subtract 8.64 from both sides so that one side can be set to 0?

    Thanks

    Peter
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  2. #2
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    Quote Originally Posted by pbwf View Post
    Hi

    I am trying to solve the following equation for x:

    8.64 = -0.0033x2 + 0.2496x + 4.2041

    I'm not exactly sure how to proceed with this. Would I first subtract 8.64 from both sides so that one side can be set to 0?

    Thanks

    Peter
    Yes.

    Then you might consider multiplying both sides by -10000 to get rid of the decimals.

    Then use the quadratic formula. I don't think there's any short cut for the tedious calculations ahead of you. Unless you use technology to solve it for you.
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