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Math Help - how do you indentify whether each function is a quadratic function

  1. #1
    Shynita Matthews
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    Unhappy how do you indentify whether each function is a quadratic function

    1) y=3-x2 2)y=2-2x+2
    Last edited by Math Help; September 7th 2005 at 09:51 PM.
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  2. #2
    hpe
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    Quote Originally Posted by Shynita Matthews
    1) y=3-x2 2)y=2-2x+2
    It's a quadratic function if x (the independent variable) appears with a square (but not with a higher or lower power).

    Example: y = 1 + 3x^2 is quadratic (I'm using ^2 to indicate the squaring, just as you would do it on a TI-86). y = x^3 - 4x^2 is not a quadratic function (it also has a third order term). y = 3x + 4 isn't quadratic either.

    Hope this helps. This is Algebra I I guess? My son just did this 2 classes ago in his math class.
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