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Jawabannya 3(B)Semoga tepat
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Bab Persamaan Lingkaran
x² + y² + 6x - 2y + 1 = 0
x² + 6x + y² - 2y = -1
(x + 3)² + (y - 1)² = 3² + 1² - 1
(x + 3)² + (y - 1)² = 3²
r² = 3²
r = 3
✩✩ B ✩✩