1. doesn’t have a gcf because there’s no number that can be evenly divided and not all of them have an x.
2. x because all the number each of them can be divided by x. The gcf can’t be anything higher, such as 2x, because 3x can’t be divided by x^2 as there’s only one x.
The vertex will be a maximum because the equation is negative, meaning the parabola opens downwards and will have a maximum point but no minimum point as it will get infinitely smaller.
