126
o:-)
the LCM of 42 and 126 using a prime factorization is 2 times 2 times 3
You need at least two numbers to find an LCM.
It is: 126
You need at least two numbers to find a GCF, whichever method you use.
As a product of its prime factors: 2*3*3*7 = 126
2 x 32 x 7 = 126
2 x 32 x 7
2x3x3x7
The prime factorization of a number is the primes whose product gives you that number.126/2 = 6363/3 = 2121/3 = 7The bold numbers are the primes. The prime factorization is just the product of these numbers. In this case: 2 x 3 x 3 x 7.Or simplified:2 x 32 x 7
126 63,2 21,3,2 7,3,3,2
42 126 ^ ^ 7x6 14x9 ^ 3x2 ^ ^ 7x2 3x3 7x3x2=LCM is 42
That's not a prime factorization because 9 isn't prime, but it does represent the number 126.