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The x-coordinate of the maximum point on the graph of
is
a) -2 b) 2 c) -4 d) 4 e) 7
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The graph of 
is shown below. The maximum occurs at the vertex.
To find the coordinates we complete the square
It follows that the coordinates of the vertex are 
.
If you miss this question please review finding the vertex of a quadratic function. Also, see 3.11: Quadratic Functions . |