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
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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) (Show Source): You can put this solution on YOUR website!
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 \ =\ ax^2\ +\ bx\ +\ c)
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: \ =\ a(x_v)^2\ +\ bx_v\ +\ c)
The only thing left for you to do is some arithmetic.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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