What's the standard equation of the circle with the general equation x² + y² + 4x − 2y-20 = 0? 1) (x + 2)² + (y − 1)² = 25 2) (x

Question

What's the standard equation of the circle with the general equation x² + y² + 4x −
2y-20 = 0?
1) (x + 2)² + (y − 1)² = 25
2) (x - 2)² + (y + 1)² = 25
3) (x + 2)2 + (y- 1)² = 5
4) (x + 1)² + (y-2)² = 5

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