Question
Answer
$$(-i)\cdot8i+8i=8i+8$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(-i)\cdot8i+8i& \xlongequal{ }-8i^2+8i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}8+8i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}8i+8\end{aligned} $$ | |
| ① | $$ -8i^2 = -8 \cdot (-1) = 8 $$ |
| ② | Combine like terms: $$ 8i+8 = 8i+8 $$ |
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