Coprime Integers/Examples/-27 and -35

Example of Coprime Integers
$-27$ and $-35$ are coprime.

Proof
The positive divisors of $-27$ are $1$, $3$, $9$ and $27$.

The positive divisors of $-35$ are $1$, $5$, $7$ and $35$.

The only integer in common between them is $1$.

Hence the result by definition of coprime.