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OpenStudy (anonymous):
What is the vertex for the graph of y = −2x2 + 8x − 13?
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OpenStudy (anonymous):
The vertex of any curve, y= ax^2+bx+c is \[(-b/2a, c-b ^{2}/4a)\] you have a=-2, b=8 and c= -13 in your equation.. now help yourself to an answer...
OpenStudy (anonymous):
i'm still confused
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