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x² + y² + Ax + By + C = 0
Pusat (-1/2A, -1/2B) ---> (-5,3)
r = jarak ttk pusat ke ttk yg dilalui
= √[(5+5)²+(2-3)²
= √(100+1)
= √101
persamaan
(x+5)²+ (y-3)² = √101²
x²+10x+25+y²-6y+9 = 101
x²+y²+10x-6y-67 = 0