Mathematics, 28.09.2019 06:50, johnwatson12

the equation of a circle is x² + y² - 4x + 2y - 31 = 0. what is the center and the radius of the circle? show your work.

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the equation of a circle is x² + y² - 4x + 2y - 31 = 0. what is the center and the radius of the cir...