Question
Answer
$$12\cdot(9-7i)=-84i+108$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}12\cdot(9-7i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}108-84i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-84i+108\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{12} $ by $ \left( 9-7i\right) $ $$ \color{blue}{12} \cdot \left( 9-7i\right) = 108-84i $$ |
| ② | Combine like terms: $$ -84i+108 = -84i+108 $$ |
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