Question

Form a set of ordered pairs where the first component is a member of $\{9,10,-12\}$ and the second component related to the first as given.

The divisor of the first component is $-1$

Answer 1

Let $A=\{9,10,-12\}$

The second component is the divisor of the first component is $-1$

So, $B=\{\frac{9}{-1},\frac{10}{-1},\frac{-12}{-1}\}$

$=\{-9,-10,12\}$

Ordered pairs are the combination of components $A$ and $B$

Hence, the ordered pairs are $(9,-9),(9,-10),(9,12),(10,-9),(10,-10),(10,12),(-12,-9),(-12,-10),(-12,12)$