document.write( "Question 660746: Write the equation of the circle in standard form. Find the center , radius, intercepts, and graph the circle.\r
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document.write( "x^2 + y^2 - 8x + 14y = -29 \n" );
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Algebra.Com's Answer #411331 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Find the center , radius, intercepts, and graph the circle. \n" ); document.write( "-------- \n" ); document.write( "Complete the square on the x and on the y terms: \n" ); document.write( "----------- \n" ); document.write( "x^2 + y^2 - 8x + 14y = -29 \n" ); document.write( "(x^2 - 8x + 16)) + (y^2 + 14y + 49) = -29 + 16 + 49 \n" ); document.write( "----- \n" ); document.write( "Factor: \n" ); document.write( "(x-4)^2 + (y+7)^2 = 36 \n" ); document.write( "------ \n" ); document.write( "Center: (4,-7) \n" ); document.write( "Radius: sqrt(36) = 6 \n" ); document.write( "Intercepts: \n" ); document.write( "x-intercepts: Let y = 0, then (x-4)^2 + 49 = 36 ; \n" ); document.write( "then (x-4)^2 = -13 \n" ); document.write( "Therefore: no x-intercepts \n" ); document.write( "------------------- \n" ); document.write( "y-intercepts: let x = 0, then (-4)^2 + (y+7)^2 = 36, \n" ); document.write( "then (y+7)^2 = 20 \n" ); document.write( "then y+7 = 2sqrt(5) or y+7 = -2sqrt(5) \n" ); document.write( "y = -7+2sqrt(5) or y = -7-2sqrt(5) \n" ); document.write( "============================================= \n" ); document.write( "========================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |