This is the concept of algebra, given that the area of a rectangular pool is (15x-9), the possible dimensions of the pool by factoring will be:
Area=length×width
Area=(15x-9)
factoring the above we get:
Area=3(5x-3)
therefore the possible dimension will be:
length=5x units
width=3 units
It cannot be simplified more than that. hope this helps!
Step-by-step explanation:

Answer:
9
Step-by-step explanation:
9 = 3 * 3
27 =3 * 3 * 3
GCF = 3*3 = 9