Question
Answer
$$7+14i-(-5-5i)=19i+12$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}7+14i-(-5-5i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7+14i+5+5i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}19i+12\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( -5-5i \right) = 5+5i $$ |
| ② | Combine like terms: $$ \color{blue}{7} + \color{red}{14i} + \color{blue}{5} + \color{red}{5i} = \color{red}{19i} + \color{blue}{12} $$ |
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