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Verified answer
LingkaranP(-6,8)
r = 4 satuan
Persamaan lingkaran :
(x + 6)² + (y - 8)² = 4²
x² + y² + 12x - 16y + 84 = 0 ✔
r = 4
rumus
(x-A)² + (y-b)² = r²
(x-(-6))² + (y-8)² = 4²
(x+6)² + y²-16y+64 =16
x²+12x+36 + y²-16y+64 =16
x²+y²+12x-16y+36+64-16=0
x²+y²+12x-16y+84=0