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(x - a)² + (y - b)² = r²
(-2 - 4)² + (3 - -3)² = r²
(-6)² + (6)² = r²
36 + 36 = r²
r² = 72
(x - a)² + (y - b)² = r²
(x - 4)² + (y - - 3)² = 72
(x - 4)² + (y + 3)² = 72
x² - 16x + 16 + y² + 6y + 9 = 72
x² - 16x + y² + 6y + 25 - 72 = 0
x² - 16x + y² + 6y - 47= 0