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Mathematics 7 Online
OpenStudy (anonymous):

The standard form of the equation of a parabola is y = x2 + 4x + 11. What is the vertex form of the equation? A. y = (x + 2)2 + 7 B. y = (x - 2)2 + 12 C. y = (x + 2)(x - 2) + 7 D. y = (x - 2)2 + 18

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