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