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persamaan lingk : (x - 1)² + (y + 4)² = 10
(x - 1)² + (y + 4)² > 10
(-2 - 1)² + (a + 4)² - 10 > 0
9 + a² + 8a + 16 - 10 > 0
a² + 8a + 15 > 0
(a + 3)(a + 5) > 0
a > -3 atau a < -5
(-2 - 1)² + (a + 4)² - 10 > 0
9 + a² + 8a + 16 - 10 > 0
a² + 8a + 15 > 0
(a + 3)(a + 5) > 0
a > -3 atau a < -5