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asked Sep 22, 2021 67.0k views

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Vatosarmat · Answer 1 · 2021-09-27T21:11:48+0000

The min or max of a parabola is always at the vertex. The x value of the vertex is
-b/2a. So the vertex is at an x of 4. Plug it into the formula and get that the y is -76. This is a maximum because the coefficient of x^2 is negative.

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