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t= y-3
x=4-t^2
x=4-(y-3)^2
x + y^2 +6y +6 = 0
t = y - 3 substitusikan ke x = 4 - t²
x = 4 - (y-3)²
x = 4 - (y²-6x+9)
x = 4 - y² + 6x - 9
x = -y² +6x - 5