SOLUTION: Determine whether f(x)= -2x^2+12x+3 has a minimum or maximum value. Then find the minimum or maximum value.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: Determine whether f(x)= -2x^2+12x+3 has a minimum or maximum value. Then find the minimum or maximum value.      Log On


   

Question 844947: Determine whether f(x)= -2x^2+12x+3 has a minimum or maximum value. Then find the minimum or maximum value.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
+graph%28+300%2C+300%2C+-10%2C10%2C-5%2C25%2C-2x%5E2%2B12x%2B3%29+
The max. occurs when df%2Fdx=0.
df%2Fdx=-4x%2B12=0
-4x=-12
x=3
f%283%29=-2%283%29%5E2%2B12%283%29%2B3
f%283%29=-18%2B36%2B3
f%283%29=21