Question

How do you find the LCD for `9/(k+3)` and `3/k`?

Answer 1

Since `k+3` and `k` have no common factors:
`color(white)("XXXX")`the Least Common Denominator of
`color(white)("XXXX")` `color(white)("XXXX")` `9/(k+3)` and `3/k`
`color(white)("XXXX")`is
`color(white)("XXXX")` `color(white)("XXXX")` `(k)(k+3) = k^2+3k`