Anybody know number 9

Answer:
(x -2)² +y² = 16
Step-by-step explanation:
The circle has its center at (h, k) = (2, 0), and has a radius of r = 4. The standard form equation is ...
(x -h)² +(y -k)² = r²
For the given values of (h, k) and r, this equation is ...
(x -2)² +y² = 16