what's the prime factorizaion of 225?

225 = 9 x 25
= 3 x 3 x 5 x 5

225 = 3 x 3 x 5 x 5
or
225 = 3^2 x 5^2

5 X 45
5 X 5 X 9
5 X 5 X 3 X 3
3² X 5²

5 times 5 times 3 times 3......................................
because 25 times 9 equals 225. The prime factorization of 25 is 5 times 5, and the prime factorization of 9 is 3 times 3.

I hope this helps!

Since 225 ends in a 5, it's natural to divide by 5 to see what we have to work with:

225 = 5 * 45 = 5 * 5 * 9
= 5 * 5 * 3 * 3

These are the prime factors.