Answer:
Step-by-step explanation: Let's see if we can factor
x
2
−
x
−
72
. What two numbers sum up to
−
1
and have a product of
−
72
?
After some trial and error, we arrive at
−
9
and
8
. Thus, we now have
(
x
−
9
)
(
x
+
8
)
Where these can represent the sides of the rectangles.
Hope this helps!