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

Since the sign before the parentheses is a + , we can just remove the parentheses.5i + (-9 - i) = 5i - 9 - i = -9 + 4i

[tex]5i+(-9-i)=\\
5i-9-i=\\
-9+4i[/tex]