PeRSaMaaN LiNGKaRaN

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x² + y² + 8x - 2y + p = 0

A = 8 ; B = -2

tikPus = (-1/2 A , -1/2 B)

tikPus = (-4 , 1)

r = √(a² + b² - c)

4 = √(16 + 1 - p)

16 = 17 - p

p = 1

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x² + y² + 8x + 2y - 8 = 0

(-1)² + y² + 8(-1) + 2y - 8 = 0

1 + y² - 8 + 2y - 8 = 0

y² + 2y - 15 = 0

(y - 3)(y + 5) = 0

jika (-1 , 3) = (x₁ , y₁)

x.x₁ + y.y₁ + 1/2A(x + x₁) + 1/2B(y + y₁) + C = 0

-x + 3y + 4(x - 1) + (y + 3) - 8 = 0

3x + 4y - 9 = 0

jika (-1 , -5) = (x₁ , y₁)

x.x₁ + y.y₁ + 1/2A(x + x₁) + 1/2B(y + y₁) + C = 0

-x - 5y + 4(x - 1) + (y - 5) - 8 = 0

3x - 4y - 17 = 0

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