Question
Answer
$$12+7i-(8-4i)=11i+4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}12+7i-(8-4i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}12+7i-8+4i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}11i+4\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 8-4i \right) = -8+4i $$ |
| ② | Combine like terms: $$ \color{blue}{12} + \color{red}{7i} \color{blue}{-8} + \color{red}{4i} = \color{red}{11i} + \color{blue}{4} $$ |
This page was created using
Complex Expression calculator