Convert the equation to Cartesian form.r = 

A. 32x2 + 56x + 81y2 - 16 = 0
B. 32x2 + 56x + 81y2 + 16 = 0
C. 32x2 - 56x + 81y2 - 16 = 0
D. 32x2 - 56x + 81y2 + 16 = 0

Answer: C

Mathematics

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