Lingkaran dan Garis Singgung
x² + y² - 6x + 4y - 12 = 0
(x - 3)² + (y + 2)² = 12 + 3² + 2²
(x - 3)² + (y + 2)² = 25
Uji titik (7,1)
(7 - 3)² + (1 + 2)²
= 16 + 9
= 25
Titik pada lingkaran
Gunakan rumus bagi adil
Persamaan garis singgung di (7,1) :
(7 - 3)(x - 3) + (1 + 2)(y + 2) = 25
4x - 12 + 3y + 6 - 25 = 0
4x + 3y - 31 = 0
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Lingkaran dan Garis Singgung
x² + y² - 6x + 4y - 12 = 0
(x - 3)² + (y + 2)² = 12 + 3² + 2²
(x - 3)² + (y + 2)² = 25
Uji titik (7,1)
(7 - 3)² + (1 + 2)²
= 16 + 9
= 25
Titik pada lingkaran
Gunakan rumus bagi adil
Persamaan garis singgung di (7,1) :
(7 - 3)(x - 3) + (1 + 2)(y + 2) = 25
4x - 12 + 3y + 6 - 25 = 0
4x + 3y - 31 = 0