Arectangle has a height of 3n^2 and a width of 4n^2-5n-1.
express the area of the entire rectangle.

Step-by-step explanation:

The dimensions of a rectangle are length and breadth/width

Here we are given height . Assuming it to be one of the side of the rectangle , we will do the further calculation

Hence one side is

side 1 =

And the other side is

Side 2 =

The area of rectangle = side 1 x side 2

Hence area can be given as expression