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L2 r=akar ( 3^2 + 6^2 - 29 ) = akar (9+36-29) = akar 16 = 4
L3 r=akar ( 3^2 + (-4)^2 - 16) = akar (9+16-16) = akar 9 = 3
b. L1 berpusat di (-8,3)
L2 berpusat di (3,6)
L3 berpusat di (3,-4)
c. L1 : x1^2 + y1^2 + 16x1 - 6y1 + 48
L2 : x1^2 + y1^2 - 6x1 - 12y1 + 29
L3 : X1^2 + y1^2 - 6x1 + 8y1 + 16