The area of the floor plan is given by the expression 20x² - 4x - 16
A rectangle is a quadrilateral (has four sides and four angles) in which opposite sides are parallel and equal to each other. Also all the angles of a rectangle measure 90 degrees each.
Area of a rectangle = length * breadth
Area of the floor plan = length * breadth
Area of the floor plan = (5x + 4) * (4x - 4)
Area of the floor plan = 20x² - 20x + 16x - 16
Area of the floor plan = 20x² - 4x - 16
The area of the floor plan is given by the expression 20x² - 4x - 16.
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