Question 722335: Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.
f(x)=x^2+2x-9
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.
f(x)=x^2+2x-9
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Since the coefficient of x^2 is positive the function opens up, so it
has a minimum point.
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Minimum occurs when x = -b/(2a) = -2/2 = -1
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f(-1) = (-1)^2 + 2*-1 - 9 = 1 +2-1 = 2
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Minimum point (-1,2)
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Cheers,
Stan H.
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