document.write( "Question 285163: graph the circle\r
\n" ); document.write( "\n" ); document.write( "x^2 + y^2 -4x + 8y = 24
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Algebra.Com's Answer #206794 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Complete the square in x and y.
\n" ); document.write( "\"x%5E2+%2B+y%5E2+-4x+%2B+8y+=+24\"
\n" ); document.write( "\"x%5E2-4x+%2B+y%5E2%2B8y+=+24\"
\n" ); document.write( "\"%28x%5E2-4x%2B4%29+%2B+%28y%5E2%2B8y%2B16%29+=+24%2B4%2B16\"
\n" ); document.write( "\"%28x-2%29%5E2+%2B+%28y%2B4%29%5E2+=+44\"
\n" ); document.write( "Compare to the general equation for a circle centered at (h,k) with a radius R:
\n" ); document.write( "\"%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2\"
\n" ); document.write( "This circle is centered at (2,-4) and has a radius of \"sqrt%2844%29=2%2Asqrt%2811%29\".\r
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