SOLUTION: I Need to Find The Range Of The Given Function. f(x)=-4x^2-24x-41 I graphed it on my calculator but i don't know how to find my range or y-values help me please thank you.

Algebra ->  Rational-functions -> SOLUTION: I Need to Find The Range Of The Given Function. f(x)=-4x^2-24x-41 I graphed it on my calculator but i don't know how to find my range or y-values help me please thank you.      Log On


   

Question 115728: I Need to Find The Range Of The Given Function.
f(x)=-4x^2-24x-41
I graphed it on my calculator but i don't know how to find my range or y-values help me please thank you.
Found 2 solutions by stanbon, pistons:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
I Need to Find The Range Of The Given Function.
f(x)=-4x^2-24x-41
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The graph would be a parabola with a maximum point.
That maximum occurs when x=-b/2a = 24/-8 = -3
f(-3) = -4(-3)^2 -24(-3)-41
f(-3) = -36 + 72-41
f(-3) = 36-41
f(-3) = -5
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So the highest y-value is -5.
Therefore the range is : all Real numbers <= -5
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graph%28400%2C300%2C-10%2C10%2C-50%2C20%2C-4x%5E2-24x-41%29
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Cheers,
Stan H.

Answer by pistons(1) About Me  (Show Source):
You can put this solution on YOUR website!
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