The length of the screen will be x+2
The formula for calculating the area of a rectangle is expressed as:
A = length * width
Given the area of the rectangle is:
A = 4x^2+20x+16
Factorise to have:
A = 4x^2 + 4x + 16x + 16
A = 2x(x+2)+8(2x+2)
A = (2x+8)(x+2)
Hence the length of the screen will be x+2
Learn more on area of rectangles here: https://brainly.com/question/25292087