What is the LCD of x-3, x+3, and x^2-9

Question

What is the LCD of x-3, x+3, and 
`x^2-9`

Answer 1

The least common denominator is one, since all of these numbers are actually whole numbers. They're actually all
`(x-3)/(1) (x+3)/(1) (x^2-9)/(1)`
If you mean the greatest common factor, then it's obviously
`x`