Question

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

The area of the rectangle is 252 in2
What is the length of the rectangle

Answer 1

21 inches. I know my math; im good at this. Trust me: I am 100% correct.

Answer 2

I think the length is 21 in because...
the width (W) is x-9
X(x-9)=252
X^2 -9x-252=0
(X-21)=0 and (x+12)=0
x=21 or x=-12
the only one that works is 21 and I checked the answer so I'm pretty sure it's 21