Question
Answer
$$7-6i-(-5-2i)=-4i+12$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}7-6i-(-5-2i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7-6i+5+2i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-4i+12\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( -5-2i \right) = 5+2i $$ |
| ② | Combine like terms: $$ \color{blue}{7} \color{red}{-6i} + \color{blue}{5} + \color{red}{2i} = \color{red}{-4i} + \color{blue}{12} $$ |
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