Răspuns :
x² + y² - 14x - 4y + 53 = 0
x² +7x + 49 + y² - 4y + 4 = 0
( x + 7 )² + ( y - 2 ) ² = 0
⇒ x + 7 = 0 si y - 2 = 0
x = - 7 y = 2
x² +7x + 49 + y² - 4y + 4 = 0
( x + 7 )² + ( y - 2 ) ² = 0
⇒ x + 7 = 0 si y - 2 = 0
x = - 7 y = 2