Is the prime factorization of 42 21 x 2?

Answer 1

Prime Factorization of 42
No, 21 X 2 is not the prime factorization of 42 because 21 is a composite number.

2 X 3 X 7 is the prime factorization of 42 because all the factors are prime numbers.

To arrive at the prime factorization in this particular case, you had to factor 21 down to its prime factors, not forgetting that one of the prime factors of 42 was already 2.

2 X 21 = 42

3 X 7 = 21, so the prime factorization of 42 is:

2 X 3 X 7
No, 21 is not prime. Try 2 x 3 x 7.

Answer 2

It's incomplete. 21 isn't prime.

42

21,2

7,3,2

2 x 3 x 7 = 42