Question
Answer
$$-7-(7+4i)=-4i-14$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-7-(7+4i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-7-7-4i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-4i-14\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 7+4i \right) = -7-4i $$ |
| ② | Combine like terms: $$ \color{blue}{-7} \color{blue}{-7} -4i = -4i \color{blue}{-14} $$ |
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