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Verified answer
Persamaan Lingkaranx² + y² + 4x - 2y + p = 0
Jari2 = 3
(x + 2)² + (y - 1)² = -p + 2² (-1)²
r² = 9
-p + 4 + 1 = 9
-p = 9 - 5
p = -4 ✔