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15 votes
15 votes
Solve for i3-2i+8=23

User Gweg
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1 Answer

24 votes
24 votes

Given the following equation:


3-2i+8=23

You need to solve for "i" in order to find its value. In order to do it, you can follow the steps shown below:

1. You can apply the Subtraction property of equality by subtracting 3 and 8 from both sides of the equation. Then, you get:


\begin{gathered} 3-2i+8-(3)-(8)=23-(3)-(8) \\ -2i=12 \end{gathered}

2. Finally, you can apply the Division property of equality by dividing both sides of the equation by -2.

It is important to remember the Sign rules for Division:


\begin{gathered} (+)/(+)=+ \\ \\ ((-))/((-))=+ \\ \\ (+)/((-))=- \\ \\ ((-))/(+)=- \end{gathered}

Therefore, you get:


\begin{gathered} (-2i)/(-2)=(12)/(-2) \\ \\ i=-6 \end{gathered}

The answer is:


i=-6

User Abidibo
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