A circle has the equation x2 + 6x + y2 - 8y - 75 = 0. What are the coordinates of the center and what is the length of its radius?

College Algebra (MindTap Course List)
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ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
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Chapter7: Conic Sections And Quadratic Systems
Section7.1: The Circle And The Parabola
Problem 1SC
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A circle has the equation x2 + 6x + y2 - 8y - 75 = 0.

What are the coordinates of the center and what is the length of its radius?

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