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k0ka [10]
3 years ago
8

Can anyone help me solve this problem?

Mathematics
1 answer:
Furkat [3]3 years ago
5 0
Its about finding the equation of a circle from its general form equation:
x^2 + y^2 + 8x - 4y - 61 = 0
x^2 + 8x + 16 + y^2 - 4y + 4 = 61 + 16 + 4
(x + 4)^2 + (y - 2)^2 = 81
therefore the center is C(-4, 2), and the radius is 9
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