Question

The length of a rectangle is 20 units more than its width. The area of the rectangle is x4−100

Answer 1

x2−10 because the area expression can be rewritten as (x2−10)(x2+10) which equals (x2−10)((x2−10)+20).

Explanation:

Step-by-step explanation: The area of the rectangle is , which can be factored as , because it's the difference of two perfect squares. But, we know that , where is the length and is the width.