Lowest Common Multiple of Integers/Examples/-12 and 30

Example of Lowest Common Multiple of Integers
The lowest common multiple of $-12$ and $30$ is:
 * $\lcm \set {-12, 30} = 60$

Proof
From Greatest Common Divisor: $-12$ and $30$:


 * $\gcd \set {-12, 30} = 6$

Then: