Question

Simplify this expression (-4-9i)+(5-7i)

Answer 1

You can simplify the real and imaginary parts independently:

-4+5 = 1
-9i-7i = -16i

So the simplified expression is 1-16i

Answer 2

To simplify you combine like terms.
You open parenthesis-
-4 - 9i + 5 - 7i
combine like terms-
1 - 16i is your answer.
Hope this helps!