Hey!
Explanation:
↓↓↓↓↓↓↓↓↓↓
First, remove parenthesis.
[tex]7i4i[/tex]
Secondly, multiple by the numbers.
[tex]7*4=28[/tex]
[tex]-28ii[/tex]
Third, apply exponents rule.
[tex]-28i^2[/tex]
[tex]i^2=-1[/tex]
[tex]-28(-1)[/tex]
Finally, refine.
[tex]=28\\[/tex]
Answer⇒⇒⇒⇒28
Hope this helps!
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Have a great day!
-Charlie
