math

Rewrite the following equation in the center-radius form of the equation of a circle.
x2 - 2x + y2 + 2y - 2 = 0

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1. just complete the squares as needed, and balance out what you had to change:

x^2-2x+1 + y^2+2y+1 - 2 - (1+1) = 0
(x-1)^2 + (y+1)^2 = 4

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