Question

Centre of the circle x² + y2– 2x+4y + 1 = 0 is –
(a) (-1,2)
(b)(1,-2)
(c) (1, 2)
(d) (-1, -2)​

Answer 1

B) (1,-2)

2fx =-2x

f=-1

2gx=4y

g=2

centre =(-g,-h)

=(1,-2)