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Math Help - Stupid question...how do I know when I'm done? Solving a polynomial equation

  1. #1
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    Stupid question...how do I know when I'm done? Solving a polynomial equation

    Solve the equation 2x^2-x-7=0. Show your work. No decimals answers will be accepted.
    Am I supposed to solve for x? How do I know where to start, and how do I know when I am done?
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  2. #2
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    x = \frac{{ - b \pm \sqrt {b^2  - 4ac} }}<br />
{{2a}}<br />
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