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15-05-2020
Mathematics

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Finding the Vertex
What is the vertex of the quadratic function f(x) = (x – 8)(x - 2)?

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sqdancefan sqdancefan

09-12-2020

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Answer:

(5, -9)

Step-by-step explanation:

The zeros are x=8 and x=2. The x-coordinate of the vertex is the average of these:

x = (8+2)/2 = 5

The y-coordinate is f(5).

f(5) = (5 -8)(5 -2) = (-3)(3) = -9

The vertex is (5, -9).

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