document.write( "Question 768547: Establish the equation of a circular object whose radius equals 6 centimetres and centre's coordinates are (3, 2).
\n" ); document.write( " A - x2 + y2 + 6x + 4y = 23
\n" ); document.write( " B - x2 + y2 - 6x + 4y = 23
\n" ); document.write( " C - x2 + y2 + 6x - 4y = 23
\n" ); document.write( " D - x2 + y2 - 6x - 4y = 23
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Algebra.Com's Answer #468355 by ramkikk66(644)\"\" \"About 
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\n" ); document.write( "Establish the equation of a circular object whose radius equals 6 centimetres and centre's coordinates are (3, 2).\r
\n" ); document.write( "\n" ); document.write( "Equation for a circle with radius r and centre at (a,b) is given by
\n" ); document.write( "\"%28x+-+a%29%5E2+%2B+%28y+-+b%29%5E2+=+r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "Here, a = 3, b = 2, r = 6
\n" ); document.write( "Just substitute in the above formula to get the equation.\r
\n" ); document.write( "\n" ); document.write( "\"%28x+-+3%29%5E2+%2B+%28y+-+2%29%5E2+=+6%5E2+=+36\"\r
\n" ); document.write( "\n" ); document.write( "Expand the left hand side and simplify, to check which of the choices is correct.\r
\n" ); document.write( "\n" ); document.write( "Hope it is clear :)
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