Question

What is the value of (-4 - 3i) + (-6 -9i) ?

Answer 1

(-4- 3i) + (-6 - 9i), and then rearrange the pieces so like terms are together
-4 - 6 - 3i - 9i         now simplify
-10 - 12i

The value of i is the √-1. which is undefined.