Question
Answer
$$10\cdot(-6-9i)=-90i-60$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}10\cdot(-6-9i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-60-90i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-90i-60\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{10} $ by $ \left( -6-9i\right) $ $$ \color{blue}{10} \cdot \left( -6-9i\right) = -60-90i $$ |
| ② | Combine like terms: $$ -90i-60 = -90i-60 $$ |
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