# In each of the following, find the centre and radius of the circles.

The equation of the given of the circle 2x2 + 2y2 –x =0.

2x2 + 2y2 –x =0

(2x2 + x) +2y2 =0

+ y2= 0

+ (y - 0)2, which is of the form (x-h)2 + (y-k)2 =r2,

Where, h =  , k = 0, and r=

Thus, the centre of the given circle is , while its radius is .

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