Final answer:
To complete the prime factorization of the number 18 using a factor tree, you start by finding two numbers that multiply to give you 18, such as 2 and 9. Write these numbers as branches below 18. Next, find the prime factors of 9, which are 3 and 3, and write them as branches below 9. Finally, you have the prime factorization of 18 as 2 × 3 × 3.
Step-by-step explanation:
To complete the prime factorization of the number 18 using a factor tree, you start by writing the number 18 at the top of the tree. Then, find two numbers that multiply to give you 18, such as 2 and 9. Write these numbers as branches below 18. Next, find the prime factors of 9, which are 3 and 3, and write them as branches below 9. Finally, you have the prime factorization of 18 as 2 × 3 × 3.