Carilah Pusat dan jari jari lingkaran dengan persamaan berikut A. x2+2x +10+Y2-6y-10=0 B. 4x2+16x+15+4y2+8y=0

x^2 + 2x + 10 + y^2 - 6y - 10 = 0
x^2 + y^2 + 2x - 6y = 0
A. Pusat : (-1/2 A, -1/2 B)
=> (-1/2 × (2), -1/2 × (-6)
=> (-1, 3)
B. Jari-jari : akar 1/4 A^2 + 1/4 B^2 - C
=> akar 1/4 (2)^2 + 1/4 (-6)^2 - 0
=> akar 1/4 × 4 + 1/4 × 36
=> akar 1 + 9
=> akar 10

4x^2 + 16x + 15 + 4y^2 + 8y = 0
4x^2 + 4y^2 + 16x + 8y + 15 = 0
A. Pusat : (-1/2 A, -1/2 B)
=> (-1/2 × 16, -1/2 × 8)
=> (-8, -4)
B. Jari-jari : akar 1/4 A^2 + 1/4 B^2 - C
=> akar 1/4 (16)^2 + 1/4 8^2 - 15
=> akar 1/4 × 256 + 1/4 × 64 - 15
=> akar 64 + 16 - 15
=> akar 65