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Verified answer
Persamaan umum lingkaran(x - a)² + (y - b)² = r²
Data soal
Pusat (-2, 5)
Jari jari r = 3
Maka persamaan lingkarannya
(x + 2)² + (y - 5)² = 9
x² + 4x + 4 + y² - 10y + 25 = 9
x² + y² + 4x - 10y + 20 = 0