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r = jarak pusat ke sumbu y = 3
pers lingkaran --> (x-a)² +(y-b)² = r²
(x-3)² + (y+2)² = 3²
x² + y² -6x + 4y + 9 + 4 - 9 = 0
x² + y² - 6x + 4y + 4 = 0