The Total solution for NCERT class 6-12
Find the centre and radius of the circle 2x2 + 2y2 – x =0
The equation of the given circle is 2x2 + 2y2 – x =0.
, which is of the form (x – h)2 + (y – k)2 = r2, where h = , k = 0, and .
Thus,the centre of the given circle is, while its radius is .
, k = 0, and 
.
, while its radius is 
.