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December 21, 2014

Homework Help: Math

Posted by Anonymous on Tuesday, August 26, 2008 at 6:21pm.

9x^2+16y^2-18x+64y-71=0

find the coordinates of the center, the foci, and the vertices of this ellipse.

9x^2+16y^2-18x+64y-71=0
9x^2-18x+16y^2+64y=71
9(x^2-2x)+16(y^2+4y)=71
9(x^2-2x+1)+16(y^2+4y+4)=71

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