document.write( "Question 610515: determine whether the following equations describe a parabola , a hyperbola and ellipse a circle ?
\n" ); document.write( "a) x^2-4x+y^2-12y=60
\n" ); document.write( "b) 2x^2-4x+y^2-12y=60
\n" ); document.write( "c) x^2-4x-2y^2-12=60
\n" ); document.write( "d) -4x+y^2-12y=60
\n" ); document.write( "e) 2x^2-4x+2y^2-12y=-60
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Algebra.Com's Answer #384445 by scott8148(6628)\"\" \"About 
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a) x and y both squared and positive with equal coefficients -- circle\r
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\n" ); document.write( "\n" ); document.write( "b) x and y both squared and positive with unequal coefficients -- ellipse\r
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\n" ); document.write( "\n" ); document.write( "c) x and y both squared, one negative and one positive -- hyperbola\r
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\n" ); document.write( "\n" ); document.write( "d) only y is squared -- parabola with a horizontal axis, opening to the right\r
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\n" ); document.write( "\n" ); document.write( "e) x and y both squared and positive with equal coefficients -- circle\r
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