Question
Answer
$$7-2i-(8-5i)=3i-1$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}7-2i-(8-5i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7-2i-8+5i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3i-1\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 8-5i \right) = -8+5i $$ |
| ② | Combine like terms: $$ \color{blue}{7} \color{red}{-2i} \color{blue}{-8} + \color{red}{5i} = \color{red}{3i} \color{blue}{-1} $$ |
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