Question

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The length of a side of a rectangle is 2 units less than a number, and the width is 4 units more than the length. Which of the following expressions represents the area of the rectangle, in square units?
A. x^2+2x+4
B. x^2-2x+8
C. x^2-4
D. x^2+4

Answer 1

It looks like it would be D but I'm not 100% sure.

Answer 2

i think you are right

Answer 3

I'm afraid it is not D. Here's how you get it:

let x be the unknown number

length is x-2
width is 4+ length, which will be 4 + x-2 = x+2

Area of a rectangle is length times width (l x w)
substitute the given expression for those dimensions to calculate for area
A = (length)(width)
A= (x-2) (x+2)

Simplify this equation or evaluate this to get correct answer.