KatieBerman KatieBerman

03-06-2015
Mathematics

Answered

F(x)=-x^2+8x+9

What is the vertex and it the vertex the minimum or maximum??

Verified Answer :

Panoyin Panoyin

03-06-2015

X - Vertex
-8 = -8 = 4
2(-1) -2

Y - Vertex
f(x) = -x² + 8x + 9
f(4) = -(4)² + 8(-4) + 9
f(4) = -(16) - 32 + 9
f(4) = -16 - 23
f(4) = -39

(x, f(x)) = (x, y) = (4, -39)

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