The shaded region between the graphs of `y=-2x^2+20` and `y=3x-15` is displayed below in orange.


The shaded region lies between `x=` and `x=` .

A typical rectangle is shown in the diagram located at position x. What is the area of this rectangle, in terms of `x`?
`Delta x`  

Now find the total area of the orange shaded region. Write your answer in exact form.

`A=`