SOLUTION: determine whether the given quadratic function has a minimum or maximum value. then find the coordinates of the minimum or maximum point. x^2+2x-9

Algebra ->  Rational-functions -> SOLUTION: determine whether the given quadratic function has a minimum or maximum value. then find the coordinates of the minimum or maximum point. x^2+2x-9       Log On


   



Question 765449: determine whether the given quadratic function has a minimum or maximum value. then find the coordinates of the minimum or maximum point. x^2+2x-9

Answer by solver91311(24713) About Me  (Show Source):
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If the lead coefficient is positive, the parabola opens upward and the vertex is a minimum, otherwise the parabola opens downward and the vertex is a maximum.

The -coordinate of the vertex of the quadratic polynomial function is found using the formula . The -coordinate of the vertex, and either the minimum or maximum value of the function depending on which way the parabola opens, is the value of the function at . Which is to say:

The only thing left for you to do is some arithmetic.

John

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