Question

I need help finding the LCM of the following (9+2p), (81-4p^2) and (9-2p). Thanks!

Answer 1

First, list the prime factorization for each expression


9+2p is prime
81-4p^2 = (9+2p)(9-2p)
9-2p is prime


Now highlight all the unique prime factors. They are 9+2p and 9-2p. Finally, multiply them out to get 81-4p^2


So the LCM is 81-4p^2