Length:

x²-9

Width:

x²-4

x4-13x²+36

4x²-26

2x2-13

x²-13x+36

(x²-4)

(x²-9)

The given expressions are:

Length: x²-9
Width: x²-4
4x²-13x²+36
4x²-26
2x²-13
x²-13x+36
x²-4
x²-9