SOLUTION: Please help me solve this problem. What is the prime factorization of 72?

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Question 197503: Please help me solve this problem.
What is the prime factorization of 72?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
72
= 2*36
= 2*2*18
= 2*2*2*9
= 2*2*2*3*3 (this is what they're looking for)