document.write( "Question 619433: find the center (h,k) and radius, r, of the cirlce. x^2+y^2+6x+8y+9=0 \n" ); document.write( "
\n" ); document.write( "Hi,\n" ); document.write( " x^2+y^2+6x+8y+9=0\n" ); document.write( " (x+3)^2 - 9 + (y+4)^2 - 16 + 9\n" ); document.write( " C(-3,-4) and r = 4