Factor 4x-8 to find possible dimensions of the dance floor.

So factor

use reverse distributiver property

ab+ac=a (b+c) or

ab-ac=a (b-c)

so we need to find a

find the common factors of the variables

4=2 times 2

8=2 times 2 times 2

common is 2 times 2=4

so 4 is a factor of both

so

4x-8 = (4) x - (4) 2 = (4) (x-2)

4 (x-2) is the answer