document.write( "Question 182197: separately(a) identify the conic and (b) give its center for each equation\r
\n" ); document.write( "\n" ); document.write( "9x^2+4y^2-18x+16y=0\r
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\n" ); document.write( "\n" ); document.write( "x^2-4y^2-4x-8y-4=0
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Algebra.Com's Answer #136847 by Mathtut(3670)\"\" \"About 
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9x^2+4y^2-18x+16y=0
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\n" ); document.write( "\"9%28x%5E2-2x%2B1%29%2B4%28y%2B4y%2B4%29-9-16=0\"
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\n" ); document.write( "\"9%28x-1%29%5E2%2B4%28y%2B2%29%5E2=25\"
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\n" ); document.write( "\"9%28x-1%29%5E2%2F25%2B4%28y%2B2%29%5E2%2F25=1\"
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\n" ); document.write( "center is (1,-2) and this is an ellipse
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\n" ); document.write( "x^2-4y^2-4x-8y-4=0
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\n" ); document.write( "\"%28x%5E2-4x%2B4%29-4%28y%5E2-2y%2B1%29-4%2B4-4=4\"
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\n" ); document.write( "\"%28x-2%29%5E2-4%28y-1%29%5E2=4\"
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\n" ); document.write( "\"%28x-2%29%5E2%2F4-%28y-1%29%5E2=1\"
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\n" ); document.write( "center is at (2,1) and this is a hyperbola
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