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OpenStudy (anonymous):
Please help Find the center of an ellipse with the equation 9x2 + 16y2 – 18x + 64y = 71. (–1, 2) (1, –2) (–2, 1) (2, –1)
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OpenStudy (anonymous):
Group the x's and y's; divide x's by 9; y's by 16; then complete square. That gives you what is called the equation of the ellipse and you can work from there.
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