The area of a rectangle is given by x^2-4x-21. What are the dimensions of the rectangle?

Answer 1

This question is nonsense.

You can pick any x >7 or <-3, solve for area (if positive), and then pick any length-width combination you want such that L*W = A

The teacher who assigned this seems to have confused algebra factoring with geometry

Answer 2

the area of the rectangle is given by the polynomial expression x^2+4x-23 ft.^2 and its length given by x-3 ft. find the width of the rectangle