Question

Find the prime factorization of each composite number 45

Answer 1

Prime factorization means to factor the composite number into only prime numbers.
So, 45=9x5=3x3x5...which are all prime.
So your answer is 3, 3, 5

Answer 2

The prime factorization of 45 is 45 = 5 x 3 x 3 OR 5 ⋅ 3 ²

Explanation:

We could also write this as:

5 ⋅ 3 ²

From the multiplication table, we know that

45 = 5 ⋅x9 where 5 is prime, but 9 is not

The prime factorization of 9 is 3 ⋅x3 ,

so the prime factorization of 45 is 45 = 5x 3x 3

OR

5 ⋅ 3 ²