document.write( "Question 616343: What is the radius of the circle given by the equation below?
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document.write( "x2 - 14x + y2 + 12y = -69 \n" );
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Algebra.Com's Answer #387652 by lwsshak3(11628) ![]() You can put this solution on YOUR website! What is the radius of the circle given by the equation below? \n" ); document.write( "Standard form of equation for a circle: (x-h)^2+(y-k)^2=r^2, (h,k)=(x,y) coordinates of center, r=radius \n" ); document.write( "x2 - 14x + y2 + 12y = -69 \n" ); document.write( "complete the square. \n" ); document.write( "(x^2-14x+49)+(y^2+12y+36) = -69+49+36 \n" ); document.write( "(x-7)^2+(y+6)^2=16 \n" ); document.write( "r^2=16 \n" ); document.write( "radius=√16=4 \n" ); document.write( " |