Her mistake is that she should have broken down 9 into its prime factors which is 3.
Factor trees are a way of expressing the factors of a number, specifically the prime factorization of a number. Each branch in the tree is split into factors. Once the factor at the end of the branch is a prime number, the only two factors are itself and one so the branch stops and we circle the number.
Now, we are told that Tabatha is asked to find the prime factorization of 54 using a factor tree. she made the factor tree shown. her answer is 2•3•9.
Now, from the definition of factor tree earlier, we see that the factors of the answer must all be prime factors but she used 9 which is not a prime factor. Thus, her mistake is that she should have broken down 9 into its prime factors which is 3.
Read more about Prime Factors at; https://brainly.com/question/1081523
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