Answer:
x² + y² - 12x - 2y - 44 = 0
Step-by-step explanation:
( x - 6 )²+( y - 1 )² = 81
( x - 6 )( x - 6 ) + ( y - 1 )( y - 1 ) = 81
(x² - 6x - 6x + 36 ) + ( y² - y - y + 1 ) = 81
(x² - 12x + 36 ) + ( y² - 2y + 1 ) = 81
x² + y² - 12x - 2y + 36 + 1 = 81
x² + y² - 12x - 2y + 36 + 1 - 81 = 0
x² + y² - 12x - 2y - 44 = 0
