How to solve -3 + 6i - (-5 - 3i ) - 8

-3 + 6i - (-5 - 3i) - 8

First, simplify brackets. / Your problem should look like: -3 + 6i + 5 + 3i - 8
Second, gather like terms. / Your problem should look like: (-3 + 5 - 8) + (6i + 3i)
Third, simplify. / Your problem should look like: -6 + 9i

 -6 + 9i