(2,-3)
a = 2, b = -3, r = 4
[tex](x-a)^2+(y-b)^2=r^2\\(x-2)^2+(y-(-3))^2=4^2\\(x-2)^2+(y+3)^2=16\\diuraikan\\x^2-4x+4+y^2+6y+9=16\\x^2+y^2-4x+6y-3=0[/tex]
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(2,-3)
a = 2, b = -3, r = 4
[tex](x-a)^2+(y-b)^2=r^2\\(x-2)^2+(y-(-3))^2=4^2\\(x-2)^2+(y+3)^2=16\\diuraikan\\x^2-4x+4+y^2+6y+9=16\\x^2+y^2-4x+6y-3=0[/tex]