Penjelasan dengan langkah-langkah:

x² + y² - 8x - 10y + 4 = 0

pusat lingkaran

P = (-A/2, -B/2)

P = [-(-8/2), -(-10/2)

P = ( 4, 5)

r = ✓[a² + b² - c]

r = ✓[4² + 5² - 4]

r = ✓37

garis singgung sejajar dgn garis

12x + 2y - 7 = 0

m = -A/B

m = -12/2

m = - 6

persamaan garis singgung lingkaran

y - b = m(x - a) ± r✓(1 + m²)

y - 5 = -6(x - 4) ± ✓37✓(1 + 6²)

y - 5 = (-6x + 24) ± ✓37✓37

y - 5 = (-6x + 24) ± 37

y = -6x + 24 + 5 ± 37

y = -6x + 29 ± 37

opsi 1

y = -6x + 29 + 37

y = -6x + 66

6x + y - 66 = 0

opsi 2

y = -6x + 29 - 37

y = -6x - 8

6x + y + 8 = 0