document.write( "Question 659754: graph x^2+9y^2+2x-18y+1=0\r
\n" ); document.write( "\n" ); document.write( "solve by completing the square. \n" ); document.write( "
Algebra.Com's Answer #411812 by lwsshak3(11628)\"\" \"About 
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graph x^2+9y^2+2x-18y+1=0
\n" ); document.write( "x^2+2x+9y^2-18y+1=0
\n" ); document.write( "(x^2+2x+1)+9(y^2-2y+1)=-1+1+9
\n" ); document.write( "(x+1)^2+9(y-1)^2=9
\n" ); document.write( "divide by 9
\n" ); document.write( "(x+1)^2/9+(y-1)^2=1
\n" ); document.write( "This is an equation of an ellipse with horizontal major axis and center at (-1,1)
\n" ); document.write( "see graph below:\r
\n" ); document.write( "\n" ); document.write( "y=±(1-((x+1)^2)/9)^.5+1\r
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