Question

The equation x2 + y2 − 2x + 2y − 1 = 0 is the general form of the equation of a circle. What is the standard form of the equation?
A) (x − 1)2 − (y − 1)2 = 1
B) (x − 1)2 + (y + 1)2 = 3
C) (x + 1)2 + (y − 1)2 = 1
D) (x − 1)2 + (y + 1)2 = 1
PLZ EXPLAIN HOW YOU GOT THE ANSWER!!!!!

Answer 1

i think its B OR D

Answer 2

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