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OpenStudy (anonymous):
Find the vertex of the parabola whose equation is y = x^2 + 2x + 9
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OpenStudy (anonymous):
complete the square: x^2 + 2x + 9 x^2 + 2x + 1 + 8 (x+1)^2 + 8 vertex is at (-1, 8)
OpenStudy (anonymous):
thank you!!
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