SOLUTION: f(x)=x2 + 2x - 9 determine whether the given quadratic function has a minmum or maximun value. then find the coordinated of the mininmun or maximun point.

Question 636499: f(x)=x2 + 2x - 9
determine whether the given quadratic function has a minmum or maximun value. then find the coordinated of the mininmun or maximun point.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

Since the coefficient of the squared term is positive
( +1 ), then the function has a minimum.
-------------
The value of the minimum will
be at when the
equation is in the form

-----------------
Plug this back into the equation

------------
So the minimum is at (-1,-10)
Here's a plot:

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