Question

Write
45
as a product of prime factors.

Answer 1

45 = 9 * 5 (5 is prime)
9 = 3 * 3 (Both 3's are prime) we are done
45 = 5 * 3 * 3 = 5 * 3^2

Answer 2

5 x 9
9 (3 x 3)
5 x 3 x 3 = 45