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Thread: Another review question

  1. #1 Another review question 
    Forum Bachelors Degree Demen Tolden's Avatar
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    I am not sure how to do this problem:

    Use the quadratic formula to solve the following equation for x.


    I don't know how to start this one.

    What do I recognize?
    This equation is an elipse.
    It cannot be further factored.
    Possibly something could be done with trig since the equation is an elipse, but I don't know what.


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  3. #2  
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    I should probably leave this one for the mathematicians but I'm going to guess that to use the quadratic formula you would have to put it in the form of a quadratic equation. That would mean pretending y is a constant, then solve for x in terms of y.


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  4. #3  
    Forum Bachelors Degree Demen Tolden's Avatar
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    That's a good idea, but when I say
    a = 4
    b = -2y
    c = 3y<sup>2</sup> - 2

    I get this funky answer
    x = (y +/- i ( 11y<sup>2</sup> + 8 )<sup>1/2</sup> ) / 4
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  5. #4  
    . DrRocket's Avatar
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    Quote Originally Posted by Harold14370
    I should probably leave this one for the mathematicians but I'm going to guess that to use the quadratic formula you would have to put it in the form of a quadratic equation. That would mean pretending y is a constant, then solve for x in terms of y.
    Precisely
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