Answer
$$-10+7i-3+4=7i-9$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-10+7i-3+4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-10+7i+1 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}7i-9\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-3} + \color{blue}{4} = \color{blue}{1} $$ |
| ② | Combine like terms: $$ \color{blue}{-10} +7i+ \color{blue}{1} = 7i \color{blue}{-9} $$ |
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