Answer:
x²+y²-18x+81-49= 0
Explanation:
For a circle with radius (r) and b center (a,b), the general form of the circle will be;
(x-a)²+(y-b)² = r²
According to the question, center given is (9,0) and radius is 7
From the value of the center,
a = 9 b = 0
Substituting this values into the general equation of the circle, this gives;
(x-9)²+(y-0)² = 7²
x²-18x+81+y² = 49
Re arranging
x²+y²-18x+81-49= 0 which gives the required equation.