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OpenStudy (keana):
What is the vertex for the graph of y = -2x^2 + 8x - 13? A:(2, 11) B:(2, -5) C:(-2, -37) D:(-2, -21)
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OpenStudy (goformit100):
B:(2, -5)
OpenStudy (goformit100):
solve it as linear equation method
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