To create a factor tree, separate each number into factors until a prime number is reached. Since the factor of 3 was taken out of 30, and 30/3 = 10, then the number that must be placed to the side of 3 is 10. Next, the number 10 can be written as 2 times 5:
Therefore, the prime factorization of the number 30 is:
[tex]30=2\times3\times5[/tex]
