ANSWER
![A.3\operatorname{cm}]()
Step-by-step explanation
The area of the rectangle is given as 24 sq cm and the length, x, is given as:

To find the length of the rectangle, x, solve the equation by factorization.
That is:

Since the length of a rectangle cannot be negative, the correct answer is:
![A.3\operatorname{cm}]()