Find U

Write your answer as an integer or as a decimal rounded to the nearest tenth.
U =

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

Find the axis of symmerty for x y=x squared -4x-8

The length of a rectangular plot of land is given by the expression 6x^3y^4. the width of the plot is given by the expression 5x^5y^4z. find an expression to represent the area of the rectangular plot.