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7x + y + -3x -3.7 +2y +2.1 -12 = 0
7x + y -3x -21 +2y + 2 -12 = 0
4x + 3y -31 = 0
a = -1/2 x -6
= 3
b = -1/2 x 4
= -2,
jadi titik pusatnya 3,-2
cri r =
jadi r = 5
r^2 =25,
jadi masukkan ke persamaan lingakarn melalui titik (x-a)(x1-a) + (y-b)(y1-b) =r^2
jadi persamaannya 4x +3y - 31 = 0,
Terima kasih :) semoga membantu