Question
Answer
$$(-2+4i)\cdot2=8i-4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(-2+4i)\cdot2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-4+8i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}8i-4\end{aligned} $$ | |
| ① | $$ \left( \color{blue}{-2+4i}\right) \cdot 2 = -4+8i $$ |
| ② | Combine like terms: $$ 8i-4 = 8i-4 $$ |
This page was created using
Complex Expression calculator