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Coordinate Geometry - Circle

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*For 1, find the standard form of the equation of the specified circle.
1.
Endpoint of a diameter, (-4,-1), (4, 1)
*For 2~4, write the given equation of the circle in standard form and sketch its graph.
2. X^2 + Y^2 -2X + 6Y - 15 = 0
3. 3X^2 + 3Y^2 - 6Y -1 = 0
4. 4X^2 + 4Y^2 -4X + 2Y -1

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Solution Summary

All the four problems have been neatly solved. Graphs included.

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