Sketch the graph of the equation. If the graph is a parabola, find its vertex. If the graph is a circle, find its center and radius.x2 + y2 - 4x - 2y - 11 = 0
A. center (-2, -1); radius = 4
B. center (2, -1); radius = 4
C. center (2, 1); radius = 4
D. center (-2, 1); radius = 4
Answer: C
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