Advanced Math practice question

Answer: 9

The vertex lies midway between the zeros, at x = 4, so the maximum value is f(4) = 9.

Common wrong answers

If you answered 4

4 is the x-coordinate of the vertex.

If you answered 7

7 is a zero.

If you answered -9

−9 has the sign wrong; the graph opens downward from a positive vertex.

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