The center of the circle (x-1)<sup>2</sup>+(y+3)<sup>2</sup> is:

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8 + 4 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

The center of the circle (x-1)2+(y+3)2 is:

(-1,3)

(1,-3)

(1,3)

(-1,-3)