Replace the polar equation with an equivalent Cartesian equation.r2 = 36r cos ? - 6r sin ? - 9

A. (x - 18)2  + (y + 3)2 = 324
B. (x + 36)2  + (y - 6)2 = 9
C. 36x - 6y = 9
D. (x - 18)2  + (y + 3)2 = 9


Answer: A

Mathematics

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