Question

8. Find the equation of the circle whose radius is 5 and the centre lies on
the positive side of x-axis at a distance 5 from the origin.​

Answer 1

( x - h )^2 + ( y - k )^2 = r^2,

h, k = centre (5,0)

5^2 +0 = 2

(x-5)^2 + y^2 =25

x^2 - 10x + 25 + y^2 = 25

x^2+y^2 - 10x = 0