Does each of the following equation represent a circle? If so, find the centre and radius of the circle. (ii) x`^2` + y`^2` - 4x + 5 = 0

Does each of the following equation represent a circle? If so, find the centre and radius of the circle. (i) x ^2 + y ^2 + 2x + 4y - 45 = 0

Does each of the following equation represent a circle? If so, find the centre and radius of the circle. (iii) 2x ^2 + y ^2 - 6x -8y - 11 = 0

Find the centre and radius of the circle x^2+y^2+8x+10y-8=0 .

Show that the equation x^2+y^2-6x+8y+21=0 represents a circle.Find the centre and radius of the circle.

Determine the centre and the radius if the circle x^2+y^2-8x+10y-12=0

Which of the following equation represent circles? (iv) x ^2 + y ^2 + 4x + 16y + 59 = 0

Which of the following equation represent circles? (ii) x ^2 + 4y ^2 + 2x + 12y + 6 = 0

Find the equation of a circle whose centre is (1,2) and radius 2.

Which of the following equation represent circles? (i) 9x ^2 + 9y ^2 + 12x + 18y + 1 = 0

Which of the following equation represent circles? (iii) x ^2 + y ^2 + 2x + 4y + 6xy + 8 = 0