Algebra-1

To simplify the expression (3 + 9i) - (-1 - 2i), follow these steps:

Step-by-Step Process

1.Distribute the Negative Sign:

When subtracting -(-1 - 2i), it becomes:

(3 + 9i) + (1 + 2i).

2.Combine the Real Parts:

Add the real numbers:

3 + 1 = 4.

3.Combin...