Assignment:
Transform the equation to standard form and find the center and radius of the circle:
1. (x - 3)2 = 9 - y2
2. x2 + y2 = 6x - 8y
3. 2x2 + 2y2 = 2x + 2y - 1
4. (x + 1)2 + (y - 2)2 = 25
Provide complete and step by step solution for the question and show calculations and use formulas.