f(x) is a quadratic function with x-intercepts at (−1, 0) and (−3, 0). if the range of f(x) is [−4, ∞) and g(x) = 2x2 + 8x + 6, compare f(x) and g(x). which statement is not correct?
a) both functions have the same vertex.
b) both functions have the same domain.
c) both functions have the same x-intercepts.
d) both functions are decreasing on the interval (−∞, −2).