Question
Answer
$$1-6i+6i-7i=-7i+1$$
Explanation
| $$ \begin{aligned}1-6i+6i-7i& \xlongequal{ }1 -\cancel{6i}+ \cancel{6i}-7i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-7i+1\end{aligned} $$ | |
| ① | Combine like terms: $$ 1 \, \color{blue}{ -\cancel{6i}} \,+ \, \color{green}{ \cancel{6i}} \, \color{green}{-7i} = \color{green}{-7i} +1 $$ |
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