document.write( "Question 807565: Identify the center, radius, and graph of x²+(y+2)²=25. Enter the center as an ordered pair,including the comma. Enter the radius exactly. don not use a decimal approximation. \n" ); document.write( "

Algebra.Com's Answer #486390 by Edwin McCravy(20065) $\"\"$ $\"About$

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Identify the center, radius, and graph of x²+(y+2)²=25. Enter the center as an ordered pair,including the comma. Enter the radius exactly. don not use a decimal approximation
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document.write( "Use the fact that\r\n" );
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document.write( "(x-h)² + (y-k)² = r² is the equation of a circle,\r\n" );
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document.write( "where (h,k) = the center and r = the radius.\r\n" );
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document.write( "In your problem, x² + (y+2)² = 25, write x as (x-0) and 25 as 5²\r\n" );
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document.write( "(x-0)² + (y+2)² = 5²\r\n" );
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document.write( "Compare that to\r\n" );
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document.write( "(x-h)² + (y-k)² = r²\r\n" );
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document.write( "and we see that h=0, k=-2, and r=5\r\n" );
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document.write( "so the center is (0,-2) and the radius is 5.\r\n" );
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document.write( "Edwin

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