Answer:
Step-by-step explanation:
we know that
The quadratic equation in vertex form is equal to
where
a is the leading coefficient
(h,k) is the vertex of the quadratic equation
Remember that
In a quadratic equation the turning point is the same that the vertex
so
(h,k)=(-1,-16)
substitute
we have one zero at (-3,0)
substitute and solve for a
substitute
Convert to standard form