You can put this solution on YOUR website! How do you put x^2+y^2+16x-14y+616=0 into standard form?
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Complete the square on the x and on the y terms:
x^2+16x+64 + y^2-14y+49 = -616+64+49
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(x+8)^2 + (y-7)^2 = -503
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Cheers,
Stan H.