Question

The width of a rectangle is 9 in. shorter than its length.

Answer 1

L*W=A
L*(L-9in)=252in^2
-9in       = -9in 
L*L = 243in
2L=243
 Do you need any more information?
Also I may be wrong but if it looks right to you than go with it. But that is what I would do.

Answer 2

Answer:

Answer is 21 inches.

Step-by-step explanation:

I know my math.