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Mathematics, 12.02.2021 14:00 shawn4544

Which equation represents an ellipse? 2x2 – 4xy + 2y2 + x – 3y + 5 = 0
2x2 – 6xy + y2 + 8x – y + 2 = 0
3x2 + 7xy + 8y2 + 3x – 9y + 5 = 0
9x2 + 3x + 9y2 – 2y + 5 = 0

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Which equation represents an ellipse? 2x2 – 4xy + 2y2 + x – 3y + 5 = 0
2x2 – 6xy + y2 + 8x –...
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