Answer:
[tex]A(x) = 2x^2-22x+144[/tex]
Step-by-step explanation:
We are given the following in the question:
Area of room =
[tex]3x^2 + 2x[/tex]
Area of rug =
[tex]x^2 + 24x - 144[/tex]
We have to find the area of of the room not covered by the rug.
Area of of the room not covered by the rug =
Area of room - Area of rug
[tex]A(x)=(3x^2 + 2x) - ( x^2 + 24x - 144)\\A(x)=3x^2 + 2x-x^2 -24x + 144\\A(x)=(3x^2-x^2)+(2x -24x) + 144\\A(x)=2x^2-22x+144[/tex]
is the required expression for the area of floor not covered by the rug.