How do you simplify (2 + 6i) - (7+9i) ?

$- 5 - 3 i$
$\textcolor{b l u e}{2} + \textcolor{g r e e n}{6 i} - \left(\textcolor{b l u e}{7} + \textcolor{g r e e n}{9 i}\right) = \textcolor{b l u e}{2} - \textcolor{b l u e}{7} + \textcolor{g r e e n}{6 i} - \textcolor{g r e e n}{9 i} = \textcolor{b l u e}{- 5} + \textcolor{g r e e n}{\left(6 - 9\right) i} = \textcolor{b l u e}{- 5} \textcolor{g r e e n}{- 3 i}$