Question
Answer
$$3\cdot(2-i)+6-4i=-7i+12$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}3\cdot(2-i)+6-4i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6-3i+6-4i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-7i+12\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3} $ by $ \left( 2-i\right) $ $$ \color{blue}{3} \cdot \left( 2-i\right) = 6-3i $$ |
| ② | Combine like terms: $$ \color{blue}{6} \color{red}{-3i} + \color{blue}{6} \color{red}{-4i} = \color{red}{-7i} + \color{blue}{12} $$ |
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