Mathematics
2eeric52
19

F(x)=-x^2+8x+9 What is the vertex and it the vertex the minimum or maximum??

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(1) Answers
nikolak

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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