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