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A = (3,0)
B = (0,1)
y = x + 2
(x - a)² + (y - b)² = r²
(3 - a)² + b² = r²
a² + (1 - b)² = r²
b = a + 2
(3 - a)² + b² = a² + (1 - b)²
9 - 6a + a² + b² = a² + 1 - 2b + b²
9 - 6a = 1 - 2b
9 - 6a = 1 - 2(a + 2)
9 - 6a = 1 - 2a - 4
9 - 1 + 4 = 6a - 2a
4a = 12/:4
a = 3
b = 3 + 2
a = 3
b = 5
r² = 5²
r² = 25
(x - 3)² + (y - 5)² = 25 - równanie okręgu
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