Answer:
A quadratic function with a double root of -4 can be written in the form:
f(x) = a(x + 4)^2
where "a" is a constant.
Explanation:
Since the root is double, we know that the quadratic function touches the x-axis at -4, but does not cross it. This means that the vertex of the parabola is located at x = -4.
To determine the value of "a", we need more information about the function. For example, we could be given a point on the parabola, the y-intercept, or some other information.
Without additional information, we cannot determine a unique quadratic function that has a double root of -4.