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The vertex of a parabola is at (12, -4), and its axis of symmetry is vertical. One of the x-intercepts is at (15, 0). What is the x-coordinate of the other x-intercept?

 Jan 24, 2020
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12 + 3 = 15  (0,15)

12 - 3 = 9     (0,9)

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 Jan 25, 2020

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