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OpenStudy (anonymous):
What is the vertex for the graph of y = −2x2 + 8x − 13? A. (2, 11) B. (2, −5) C. (−2, −37) D. (−2, −21)
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OpenStudy (mertsj):
The x coordinate of the vertex is -b/(2a) Find that number and then plug it into the equation to find the y coordinate of the vertex.
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