#### Answer

$225=5^2\times3^2$

#### Work Step by Step

The prime factorization of 225 can be calculated by dividing it with prime numbers:
225 is a multiple of 5.
$225= 5\times45$
45 is a multiple of 5.
$225=5\times5\times9$
9 is the square of 3.
$225=5^2\times3^2$