document.write( "Question 1051880: find the radius and centre of a circle with equation 3x^2+3y^2+6x-5y+2=0 \n" ); document.write( "
Algebra.Com's Answer #667326 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"3x%5E2%2B3y%5E2%2B6x-5y%2B2\"\"%22%22=%22%22\"\"0\"\r\n" );
document.write( "\r\n" );
document.write( "\"3x%5E2%2B6x%2B3y%5E2-5y\"\"%22%22=%22%22\"\"-2\"\r\n" );
document.write( "\r\n" );
document.write( "\"x%5E2%2B2x%2By%5E2-expr%285%2F3%29y\"\"%22%22=%22%22\"\"-2%2F3\"\r\n" );
document.write( "\r\n" );
document.write( "\"%28x%5E2%2B2x%29%2B%28y%5E2-expr%285%2F3%29y%29\"\"%22%22=%22%22\"\"-2%2F3\"\r\n" );
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document.write( "Complete the square in the first parentheses by\r\n" );
document.write( "adding \"%22%22=%22%22\"\"-2%2B1%2B25%2F36\"\r\n" );
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document.write( "\"%28x%2B1%29%5E2%2B%28y-5%2F6%29%5E2\"\"%22%22=%22%22\"\"37%2F36\"\r\n" );
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document.write( "Compare to\r\n" );
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document.write( "\"%28x-h%29%5E2%2B%28y-k%29%5E2\"\"%22%22=%22%22\"\"r%5E2\"\r\n" );
document.write( "\r\n" );
document.write( "\"-h=%22%22+%2B+1\", \"-k=-5%2F6%29%2C++%7B%7B%7Br%5E2=37%2F36\"\r\n" );
document.write( "\"h=-1\", \"k=5%2F6\", \"r=sqrt%2837%29%2F6\"\r\n" );
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document.write( "center = (h,k) = \"%28matrix%281%2C3%2C-1%2C%22%2C%22%2C5%2F6%29%29\"\r\n" );
document.write( "radius = r = \"sqrt%2837%29%2F6\"\r\n" );
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document.write( "Edwin

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