Question

Perform the indicated operation and write in standard form 5i+(-9-i)

Answer 1

$5i+(-9-i)=\\ 5i-9-i=\\ -9+4i$

Answer 2

Since the sign before the parentheses is a + , we can just remove the parentheses.

5i + (-9 - i) = 5i - 9 - i = -9 + 4i