Answer:
(x + 7)² + y² = 16
Explanation:
the equation of a circle in standard form is
(x - h )² + (y - k)² = r²
where (h, k ) are the coordinates of the centre and r is the radius
here (h, k ) = (- 7, 0 ) and r = 4 , then
(x - (- 7) )² + (y - 0 )² = 4² , that is
(x + 7)² + y² = 16