Hello There!
Factor them by their prime factors:
3 = 3
4 = 2 x 2 or 2²
32 = 2 x 2 x 2 x 2 x 2 or

9 = 3 x 3 or 3²
Since you can divide 32 by 4 and 9 by 3, you only need to use 32 and 9.
LCD = 2 x 2 x 2 x 2 x 2 x 3 x 3
LCD =

x

LCD =
288Hope This Helps You!Good Luck :)
- Hannah ❤