TOLONG YAA DI BANTU!! NOMER 3 DAN 4 !

3)
a) (x - 5)² + (y - (-7))² = 3²
x² - 10x + 25 + y² + 14y + 49 = 9
x² + y² - 10x + 14y + 74 - 9 = 0
x² + y² - 10x + 14y + 65 = 0
b) (x - (-4))² + (y - 1)² = (√11)²
x² + 8x + 16 + y² - 2y + 1 = 11
x² + y² + 8x - 2y + 17 - 11 = 0
x² + y² + 8x - 2y + 13 = 0
4) a) (x + 6)² + (y - 3)² = 16
(x - (-6))² + (y - 3)² = 4²
p = (-6 , 3)
r = 4
b) (x - 2)² + (y - 3)² = 7
(x - 2) + (y - 3)² = (√7)²
pusat = (2 , 3)
r = √7