Answer:
D
Explanation:
Start with the general equation of a circle
(x-h)² + (y-k)² = r²
where (h, k) are the coordinates of the center, and r is the radius
x²-6x+y²-8y = 0 , form prefect squares while keeping the equation balanced
x²-6x +3² +y²-8y +4² = 3² + 4²
(x-3)² +(y-4)² = 9 + 16
(x-3)² +(y-4)² = 25
(x-3)² +(y-4)² = 5² , compare with (x-h)² + (y-k)² = r²
Radius = 5
