If (-2,5) is the centre of the circle which touches y-axis, then the equation of the circle is
x 2+y2-4x-10y+25=0
x 2+y2-4x-10y+4=0
x 2+y2+4x+10y+2=0
x 2+y2+4x-10y+25=0
C =(-2,5) Circle touches Y-axis \ ∴ r = 1 - 3 = 2 (x+2)2+(y−5)2 = 22 x2+y2+4x−10y+25 = 0