Hey!
Explanation
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First, simplify.
[tex]5j+7+4j[/tex]
Group like terms:
↓↓↓↓↓↓↓↓↓↓↓↓↓
[tex]5j+4j+7[/tex]
Second, add similar elements.
[tex]5j+4j=9j[/tex]
[tex]=9j+7[/tex]
[tex]=9(9j+7)[/tex]
And the answer is⇒⇒⇒⇒=9(9j+7)
Hope this helped!
Thank you for posting your question.
-Charlie
