(X-C')'n(A-B), pls i need answers urgently

Write a polynomial that fits the description: a third-degree polynomial with leading coefficient -4

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)