document.write( "Question 312994: x^2+6x+y^2-2y=90 \n" ); document.write( "

Algebra.Com's Answer #223818 by Fombitz(32388) $\"\"$ $\"About$

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Complete the square in x and y.
\n" ); document.write( " $\"x%5E2%2B6x%2By%5E2-2y=90\"$
\n" ); document.write( " $\"%28x%5E2%2B6x%2B9%29%2B%28y%5E2-2y%2B1%29=90%2B1%2B9\"$
\n" ); document.write( " $\"%28x%2B3%29%5E2%2B%28y-1%29%5E2=100\"$
\n" ); document.write( "Compare to the equation of a circle centered at (h,k) with radius R,
\n" ); document.write( " $\"%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2\"$ \r
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\n" ); document.write( "Center:(-3,1)
\n" ); document.write( "Radius 10
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