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March 28, 2017

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Find the maximum value of: y=-3x^2 -15x +1

  • College algebra - ,

    in any parabola ax^2+bx+c=0, the max value is attained at x = -/2a.

    So, here that would be when x = 15/-6 = -5/2

    y(5/2) = 19.75

  • College algebra - ,

    another way of solcinf the problem is by deriving and setting dy/dx=0...but the above sol. is easier that but its disadv. is you may forget the formula.. :D

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