Prime Factorization of 18:

Express the composite number as a product of its prime factors.

Draw the possible factor trees to write the factorization of 18.

Both trees give same reuslt. Prime factors are unique to a particular number.

The prime factorization of 18 is  2 · 3 · 3 or  2 · 3².

The prime factorization of 18 is  2 · 3 · 3 or  2 · 3².