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The x co-ordinate of a quadratic lies exactly halfway between the two x-intercepts, assuming they exist.

Alternatively, the x co-ordinate can be found using the formula -B/(2A), when the function is in the form, y = Axx + Bx + C.

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Q: When the graph of a quadratic function crosses the x-axis twice the x-coordinate of the vertex lies between the two x-intercepts?
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