?Use the Principal Axes Theorem to perform a rotation of axes to eliminate the xy-term in the quadratic equation 
. Identify the resulting rotated conic and give its equation in the new coordinate system.
?
A. ?Ellipse; 
B. ?Hyperbola; 
C. ?Ellipse; 
D. ?Hyperbola; 
E. ?Ellipse; 
Answer: A
Mathematics
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A. ±2
B. ±4i
C. ±2i
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