Question
Answer
$$-(1+2i)-(3-5i)=3i-4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-(1+2i)-(3-5i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-1-2i-(3-5i) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-1-2i-3+5i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}3i-4\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left(1+2i \right) = -1-2i $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left( 3-5i \right) = -3+5i $$ |
| ③ | Combine like terms: $$ \color{blue}{-1} \color{red}{-2i} \color{blue}{-3} + \color{red}{5i} = \color{red}{3i} \color{blue}{-4} $$ |
This page was created using
Complex Expression calculator