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pusat: (a,b)
jari-jari: r
3x² + 3y² + 3x - 6y - 3 = 0 kedua ruas dibagi 3
x² + y² + x - 2y - 1 = 0
x² + x + y² - 2y = 1
x² + x + 1 + y² - 2y + 1 = 1 + 1 + 1
(x + 1)² + (y - 1)² = 3
pusat: (-1,1)
jari-jari: √3
semoga membantu ya :)