First you had to used their apply complex arithmetic rule.
[tex](5*1-(-1)(-5))+(5(-5)+(-1)*1)i[/tex]
Then you had to refine by equation.
[tex]0-26i[/tex]
Finally, refine again by equation.
[tex]=-26i[/tex]
Final answer: [tex]\boxed{=-26i}[/tex]
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
