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Math Help - quadradic function

  1. #1
    kjonae_0469
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    quadradic function

    Please help me someone Im having trouble solving these 2 problems. I am stuck your help would be greatly appreciated!!

    Determine without graphing, whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.
    f(x) = 2x2 - 4x

    Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = -x2 - 8x - 4
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by kjonae_0469 View Post
    Please help me someone Im having trouble solving these 2 problems. I am stuck your help would be greatly appreciated!!

    Determine without graphing, whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.
    f(x) = 2x2 - 4x
    the coefficient of x^2 is positive, therefore, this quadratic has a minimum value. It occurs at the vertex.

    To find the vertex of a quadratic of the form f(x) = ax^2 + bx + c, we use the formula: x = \frac {-b}{2a}

    Thus the vertex is the point \left( \frac {-b}{2a}, f \left( \frac {-b}{2a} \right) \right)


    Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = -x2 - 8x - 4
    Use the formula i mentioned above


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