document.write( "Question 146344: Find the equation of a circle with radius 5 and centered at (3,-1).\r
\n" ); document.write( "\n" ); document.write( "a. \"x%5E2%2By%5E2-9x%2B2y-15=0\"
\n" ); document.write( "b. \"x%5E2%2By%5E2-6x%2B2y%2B15=0\"
\n" ); document.write( "c. \"x%5E2%2By%5E2-6x%2B2y-15=0\"
\n" ); document.write( "d. x^2+y^2+6x-2y+15=0}}
\n" ); document.write( "e. nota\r
\n" ); document.write( "\n" ); document.write( "i have no idea where to start ... thank you for your help in advance
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Algebra.Com's Answer #106880 by aswathytony(47)\"\" \"About 
You can put this solution on YOUR website!
equation of circle with centre (h,k) and radius r is ( x -h)^2 +(y-k)^2= r^2.\r
\n" ); document.write( "\n" ); document.write( "here centre (h,k) = (3, -1) , r =5.\r
\n" ); document.write( "\n" ); document.write( "substituting these values in the equation we get,
\n" ); document.write( " (x - 3)^2 + (y - (-1))^2 = 5^2
\n" ); document.write( " (x-3)^2 + ( y + 1)^2 = 25
\n" ); document.write( " x^2 -6x +9 + y^2 + 2y + 1 =25
\n" ); document.write( " x^2 + y^2 - 6x +2y+ 9+1 - 25 =0\r
\n" ); document.write( "\n" ); document.write( " x^2 + y^2 - 6x + 2y -15 = 0
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