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(x - h)² + (y - k)² = r²
Dados el punto(2,-3) y r=8
(x - 2)² + (y - (-3))² = 8²
(x - 2)² + (y + 3)² = 64
x² - 4x + 4 + y² + 6y + 9 = 64
x² + y² - 4x + 6y -51 = 0
(x - a)² + (y - b)² = r²
(a , - b) = (2 , - 3)
r = 8
(x - 2)² + (y - (- 3))² = 8²
(x - 2)² + (y + 3)² = 64 Aplicas productos notables
(a - b)² = a² - 2ab + b²
(a + b)² = a² + 2ab + b²
(x² - 2(x)(2) + 2² + y² + 2(y)(3) + 3² = 64
x² - 4x + 4 + y² + 6y + 9 = 64
x² - 4x + y² + 6y + 4 + 9 - 64 = 0
x² - 4x + y² + 6y + 13 - 64 = 0
x² - 4x + y² + 6y - 51 = 0
Respuesta.
x² - 4x + y² + 6y - 51 = 0