Answer:
g(x) = (x + 3)²
Step-by-step explanation:
the equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
here (h, k ) = ( - 3, 0 ) , then
g(x) = (x - (- 3))² + 0 , that is
g(x) = (x + 3)²