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Algebra 14 Online
OpenStudy (anonymous):

f(x)=-x^2+4x+5 find maximum y value on graph of y=f(x)

OpenStudy (shubhamsrg):

has differentiation been taught to you ?

OpenStudy (anonymous):

Pre-calc method: Complete the square and rewrite the function as a parabola in vertex form. Calc method: Find the critical points, apply the first derivative test.

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