## Elementary Algebra

$120 = 2 \cdot 2 \cdot 2 \cdot 3 \cdot 5$
The number is even so it is divisible by 2. Factor out 2 to obtain: $120= 2 \cdot 60$ 60 is even, so factor out 2 to obtain: $120 = 2 \cdot 2 \cdot 30$ 30 is even, so factor out 2 to obtain: $120 = 2 \cdot 2 \cdot 2 \cdot 15$ 15 is divisible by 3 so factor out 3 to obtain: $120 = 2 \cdot 2 \cdot 2 \cdot 3 \cdot 5$