Question

Find the prime factorization of 210.
2 X 3 X 5 X 7
2 X 3 X 35
2 X 7 X 15

Answer 1

2*3*5*7

Answer 2

First, not that 210 is divisible by \(10=2\cdot5\). So divide by that and we get \[210=2\cdot5\cdot21\]We know the factorization of 21 to be \(3\cdot 7\), so this means that \[210=2\cdot3\cdot5\cdot7\]